Events



Events, also known as invasions, are temporary occasions when special enemies spawn, most at elevated spawn rates, even near NPCs, and attack players. Some events occur randomly, while others can be triggered via certain summoning items or special circumstances. Events spawn their own unique enemies not seen during ordinary gameplay, which can in turn drop unique items that are only obtainable within the event. Some events also bring unique visuals, such as an altered Moon and noticeable shaders applied to the screen. Events also are accompanied by their own special music, adding on to their theme. Depending on the particular event, they may last until a certain time limit is reached, or until a certain number of enemies are defeated.

On the, a progress bar can be seen in the bottom right corner of the screen to indicate how far the player has gone into the event, and how far they are from completing it.

Note that invasions (a subcategory of events) seem to require that an NPC is nearby; if an invasion's progress bar disappears beyond a certain distance, it may be necessary to place a house near the area.

There are currently 10 / 7  / 6  different events, including invasions.

Blood Moon


The Blood Moon is an event that has a 1 in 10 chance of happening every night as long as one player in the world has 120 health or more. A message saying: "The Blood Moon is rising..." is displayed when the event starts. During this event the spawn rate of enemies and the maximum amount of enemies that can be on the screen at any time is increased. Enemies will also spawn near NPCs, even when they normally do not. It can be skipped using an Enchanted Sundial.

During a Blood Moon, Zombies, Werewolves and Possessed Armor can open doors after a few hits.

Special enemies spawn in addition to the usual enemies of the surface biome the players stands in. The following enemies spawn during a Blood Moon: If the world is in Hardmode:
 * : A stronger variety of a zombie. Increases in movement speed the closer they are to a player.
 * : Commonly found flying enemies.
 * An uncommon zombie variant occasionally found during the event.
 * : An uncommon zombie variant occasionally found during the event.
 * Spawns in place of a normal bunny in a Corruption world and is no longer a harmless critter.
 * Spawns in place of goldfish in bodies of water in Corruption worlds, or can be seen walking if rain is falling.
 * Spawns in place of a penguin in the Snow Biome.
 * : Spawns in place of a normal bunny in a Crimson world and is no longer a harmless critter.
 * : Spawns in place of goldfish in bodies of water in Crimson worlds, or can be seen walking if rain is falling.
 * : Spawns in place of a penguin in the Snow Biome.
 * A potentially very dangerous enemy. Attacks by flinging bombs toward the player.

will also bloom during a Blood Moon. They can be found in the Corruption/Crimson even if it isn't a Blood Moon.

All water in the world aside from the ocean and near a Water Fountain gains a blood red color, including Rain. It does this similarly to the Crimson Biome.

[[File:Extra 9.png]]Goblin Army[[File:Extra 9.png]]


The Goblin Army is an event that has a 1 in 3 chance of occurring every dawn if certain criteria are met. It can also be summoned using a Goblin Battle Standard. Before the event starts the message: "A Goblin Army is approaching from the [east/west]!" will be displayed a certain number of times. When the Goblin Army is about to spawn around the players spawn point the message: "A Goblin Army has arrived!" will be displayed.

During the event, five ( six during Hardmode) different types of Goblins will spawn:

Although they do not appear in the Goblin Invasion, Goblin Scouts can be found rarely on the outer thirds of the map. They do drop Tattered Cloth, though, which is a key ingredient in crafting the Goblin Battle Standard.
 * : A basic Goblin that can destroy doors and inflicts basic melee damage.
 * : A Caster-type enemy that fires Chaos Balls which can travel through walls. It teleports to a location near the player after firing 3 projectiles.
 * : A quicker Goblin that can also jump higher than the others.
 * : A Goblin with more health, defense, and damage than others, that takes the most time to kill. It cannot collide with wood platforms in any way.
 * : A Goblin that shoots arrows at the player.
 * : A Goblin mini-boss that appears during Hardmode, will summon multiple Shadowflame Apparitions to attack the player.

The "Boss 1" theme used to play during a Goblin Army, but as of the 1.3.0.1 update, the Goblin Army has its own theme.

When the last wave of Goblins has spawned, the message: "The Goblin Army has been defeated!" will display, and the Goblin Tinkerer will spawn underground (only if defeated for the first time).

Slime Rain
The Slime Rain is an event that has a random chance of occuring in a world, and the event starts when the message"Slime is falling from the sky!" is announced in chat. It can only appear, though, if the player has at least 140 health and 8 defense (except in Expert Mode, where it can occur with a significantly decreased chance before meeting the criteria), in which after those criteria are met the random chance of occurring will be put into play. During this time, different variations different slimes fall from the sky constantly until the day or night is over. If the player kills 150 (75 if King Slime was previously defeated) slimes before the event naturally ends, King Slime will spawn. Once the event is over, the message "Slime has stopped falling from the sky." will be displayed in chat.

Many types of slimes spawn including:


 * : A common slime.
 * : A common slime.
 * : A common slime.
 * : A rare slime who will always drop Pink Gel.
 * : The boss of all slimes, spawns at the end of the event if enough slimes are killed.

[[File:Extra 7.png]]Frost Legion[[File:Extra 7.png]]


The Frost Legion is an event which is very massive, similarly to the Goblin Army, but the item to start the event is only attainable legitimately in Hardmode. The seasonal update allows mobs to drop Presents, if on a Hardmode world these presents have a 1 in 13 chance of containing a Snow Globe, the item used to spawn the Frost Legion. Before the event starts, the message: "The Frost Legion is approaching from the [east/west]!" will display. When the Frost Legion is about to spawn around the players spawn point, the message: "The Frost Legion has arrived!" will be displayed.

During the event, three different types of unique snowmen will spawn:


 * : A Snowman enemy that wields a knife, inflicting melee damage.
 * : A Snowman that inflicts ranged damage with a gun.
 * : A Snowman that throws snowball projectiles, which form Snow blocks on impact.

All of the snowmen drop Snow blocks, technically granting the player a way to obtain infinite amounts of Snow.

When the Frost Legion have arrived, the "Boss 3" theme will play.

When the last wave of snowmen has spawned, the message: "The Frost Legion has been defeated!" will display.

After the Frost Legion has been defeated, the Santa Claus NPC will be available (Only in the Christmas period) and will move into an empty home.

Solar Eclipse


The Solar Eclipse is a rare Hardmode event that has a 1/20 chance to occur each day, as long as any Mechanical Boss has been defeated. It can also be summoned with a Solar Tablet. A Solar Eclipse will be announced at dawn with the message "A Solar Eclipse is happening!". The sun will rise obscured by the moon, dramatically reducing natural light to a level darker than nighttime. Normal biome enemy spawns are replaced with special enemies that can spawn near NPCs, and spawn much more frequently and in greater numbers than usual. It can be skipped using an Enchanted Sundial.

The enemies that spawn during a Solar Eclipse at the start of Hardmode are as follows:
 * : A swampy creature that can run quickly. Can also drop a Broken Hero Sword.
 * : A zombie-like creature that has much more health than a normal zombie. Can also drop a Broken Hero Sword.
 * : A slow-moving zombie variant with high health. It is capable of firing a laser that somewhat increases in frequency the lower its health is at.
 * : Enemies that spawn as very fast bats that may target the player. They morph into their humanoid form upon coming close to a player. Can drop Broken Bat Wings.
 * : A fast-moving enemy that can climb on background walls.
 * : Fast-moving enemies that can jump at the player.
 * : A fighter-type enemy that has the ability to swim and gains increased mobility underwater.

After all three Mechanical Bosses have been defeated:
 * : A dark creature that is similar to the wraith. Reapers are best dealt with by standing on a platform over an empty space.(Only on PC do they only spawn after all three Mechanical Bosses have been defeated. On all other platforms it is during any Solar Eclipse)
 * : A flying enemy that has much more health than any other in the Solar Eclipse. They can fly through blocks and will continually attack the player until killed. It drops a Broken Hero Sword. It can also drop Mothron Wings and The Eye of Cthulhu yoyo once Plantera has been defeated.
 * : Occasionally hatched from eggs laid by Mothron.

After Plantera has been defeated:


 * : A basic fighter enemy that can attack with a chainsaw.
 * : A very dangerous enemy with high HP that attacks by firing a spread of nail projectiles.
 * : An enemy which will phase through walls to get near the player, then turn solid and attack with melee charges.
 * : Spawns in an invisible stealth mode. Deals very high damage if a player gets close while it is in stealth.
 * : Attacks by throwing area-of-effect Toxic Flasks.

During the Solar Eclipse, its own special theme will play for the duration of the event.

The solar eclipse lasts for one (1) in-game day.

[[File:Extra 11.png]]Pirate Invasion[[File:Extra 11.png]]


The Pirate Invasion is an event that is very similar to the Goblin Army. It can spawn randomly, or be summoned by the use of a Pirate Map, which can be obtained from killing any mob in the Ocean biome during Hardmode. When activated, a message will warn all players that "Pirates are approaching from the East/West!" When the Pirate Invasion has reached the original spawn point, a message will send, saying "The Pirates have arrived!"

During the event, six different enemies themed around a pirate crew will spawn:
 * : A simple enemy. Very similar to the Goblin Peon.
 * : A pirate enemy who carries and shoots a gun.
 * : Similar to the deckhand, but a little faster with a little more damage. He carries the Cutlass.
 * : Similar to the Goblin Archer. She carries a crossbow that seems to resemble one of the repeaters obtainable during hardmode.
 * : The strongest pirate enemy you will encounter. He walks normally until the player enters his range, and then enters attack mode where he mounts a machine gun and starts to rapid fire at the player. Upon being attacked, he will cease to fire, and will not start firing again until the player stops attacking him. He can also fire cannonballs.
 * : A flying enemy that seems to spawn near the Captain.
 * : A flying pirate ship boss that appears only after the event reaches 50%. It has four cannons with individual health bars that must be destroyed to defeat the ship. It also spawns many of the normal Pirate Invasion enemies.

Before the 1.3.0.1 update, the theme played during the event was the "Boss 4" theme. On the Desktop version, the Pirate Invasion now has its own track.

Upon defeating the Pirate Invasion, a message will appear stating that "The Pirates have been defeated!".

Defeating the Pirate Invasion unlocks the Pirate NPC, which will arrive during daytime if the player has an available house.

[[File:Extra 12.png]]Pumpkin Moon[[File:Extra 12.png]]


The Pumpkin Moon is a challenging Halloween-themed gauntlet that can only be summoned at night with the Pumpkin Moon Medallion. Unlike other events, the Pumpkin Moon takes place in distinct waves, each one preceded with the message "Wave [#]: [list of the monsters that will be spawning in the wave]". There are a total of 15 waves, which grow harder as the night wears on, culminating in the "Final Wave," which lasts for the remainder of the night. Later waves will contain multiple boss-caliber monsters, so it is not recommended for players to summon the Pumpkin Moon until they have end-game weapons and armor and well-reforged accessories. It can be skipped using an Enchanted Sundial, however it would be considered a waste of resources.

The Pumpkin Moon has seven monsters, in increasing order of difficulty:
 * : The most basic monster, it slowly walks or hops about.
 * : A slow but resilient monster that is highly resistant to knockback.
 * : An extremely fast Wolf-like creature.
 * : A floating monster that passes through walls like a Wraith.
 * : The first boss-type monster, it passes through and climbs blocks and shoots volleys of fireballs.
 * : Another boss-like monster; it is similar to the Unicorn, but takes no knockback and is much more dangerous.
 * : The strongest beast of the Pumpkin Moon, Pumpking is similar to Skeletron and has three modes of attack based on which face it is wearing.

The Pumpkin Moon used the "Eclipse" music track, but got its own in 1.2. Though there are no rewards for surviving the event, most (if not all) of the enemies can drop unique items, including Spooky Wood and equipment like the Spooky Hook and Raven Staff.

[[File:Extra 8.png]]Frost Moon[[File:Extra 8.png]]


The Frost Moon is a Christmas-themed event similar to the Pumpkin Moon that can only be summoned at night with the Naughty Present. It uses the same wave system as the Pumpkin Moon, with each new wave starting with the message "Wave [#]: [list of the monsters that will be spawning in the wave]". The Frost Moon also has an additional five "bonus waves" after the "Final Wave", making the max wave count to 20. Enemies have similar behavior to Pumpkin Moon counterparts, but are tougher, making this event the hardest as of Terraria 1.2.4.1. It can be skipped using an Enchanted Sundial, however it would be considered a waste of resources.

It has 11 types of enemies:
 * : Basic enemy found in the early waves.
 * : Another fighter-type enemy.
 * : Dangerous ranged enemies that shoot flaming arrows.
 * : Powerful enemies that come in two variants.
 * : Similar to Krampus and Nutcrackers, but stronger.
 * : Flying, bullet-shooting enemies, with high damage.
 * : Stronger version of Nutcrackers.
 * : Fly at the player at high speed, making them dangerous enemies.
 * : The first boss found during the Frost Moon, which shoot pine needles and tree decorations at the player. Can get through walls to reach the player.
 * : The second boss of this event, that shoots bullets, rockets and presents.
 * : The final boss, the strongest of the event. It's very evasive, and has attacks which are hard to dodge.

Its own special theme will play during the event.

[[File:Extra 10.png]]Martian Madness[[File:Extra 10.png]]
The Martian Madness event is a post-Golem event. It is unique from the others in that in order to start it you must find a Martian Probe randomly around the surface and space levels of the world and go into its light. Once you're discovered by a Martian Probe, it will float away and, if not destroyed by the time it leaves the screen, it will initiate the Martian Madness event, displaying the message "Martians are invading!". If you do not wish to unintentionally begin the event, it is recommended to destroy the Probe immediately. The Martian Madness event has enemies as follows:


 * : A UFO that shoots a powerful beam, along with lasers. Can drop strong weapons for each class, including a mount.
 * : A fast-moving creature with a mounted Scutlix Gunner, both of which attack independently.
 * : A large, swift enemy that rapidly fires lasers.
 * : A flying enemy that suicide-bombs the player, scattering harmful sparks on the ground.
 * : A stationary enemy that fires lasers that inflict Electrified.
 * : A Martian using a melee weapon that inflicts Electrified.
 * : A Martian that occasionally plants Tesla Turrets.
 * : A Martian protected by a Bubble Shield that must be depleted before it can be harmed.
 * : A Martian that fires mundane lasers.
 * : A Martian with no unusual abilities.
 * : A Martian that fires confusion-inducing lasers.

The Martian Madness event has its own theme that it plays during the duration of the event.

Once the last wave of martians have spawned and been defeated, a message will appear stating that "The martians have been defeated!".

Lunar Events
The Lunar Events start after defeating the Lunatic Cultist boss. The message saying "Celestial creatures are invading!" indicates the beginning of the events. This is a very unique event that spawns four different pillars, spread evenly across your world. These pillars spawn similarly-colored enemies that invade your world. There are four different pillars: the Solar Pillar, the Vortex Pillar, the Nebula Pillar, and the Stardust Pillar. All of them drop shards, which are used to craft endgame gear. The Moon Lord will spawn around 1 minute, or 1 in-game hour after the completion of this event.

In Solar area:
 * : Source of the Solar area. It shoots fireballs which will follow you, until you destroy them. Drops Solar Fragments. The Melee based pillar.
 * : Ground humanoid enemy that frequently rolls up into a ball and spins in the air, reflecting bullets directly back at the player.
 * : Ground humanoid enemy that does high damage and charges at the player with a flaming spear.
 * : Enemies that float around your character, occasionally charging at you.
 * : A slow moving enemy, that will occasionally attack by curling into a ball and flinging itself at you. They bounce off of walls when spinning.
 * : Enemies that fly around in the air. Only hostile when the player/s is in the air. Very dangerous and can only be attacked from tail orb.
 * : A Dangerous enemy that fires solar flares at the player if they're a certain distance away.
 * : A combination of both the Drakomire and the Drakanian.

In Vortex area:
 * : Source of the Vortex area. It will attack by creating lightning bolts above you. Drops Vortex Fragments. The Ranger based pillar.
 * :A high damage humanoid enemy that summons a lightning portal on death.
 * : A bigger version of the Alien Hornets, that have more offense and defense. They fire stingers at you, which have a chance to apply a debuff that causes your gravity to be distorted.
 * : Enemies that will spawn through portals above your character. Similarly to Hornets, they fly around your character hitting you. Doesn't fire stingers.
 * : Spawns at the death point of an Alien Queen. Eventually grow into Alien Hornets.
 * : A humanoid ranger enemy that wields a gun that looks similar to a Vortex Beater and fires vortex lasers at the player, doing massive damage even with end-game gear.

In a Nebula area:
 * : Source of the Nebula area. It doesn't really have an attack, unlike the other pillars. Drops Nebula Fragments. The Mage based pillar.
 * : Enemies that fly around near your character, shooting its projectiles at you. Similar to Flow Invader. Teleports when damaged.
 * : Enemies that will fly towards your character through walls, and latch onto you to decrease visibility by a lot. Slowly deal damage.
 * : A dangerous humanoid enemy that summons star-like turrets that launch to the player location, dealing massive damage.
 * : A wolf-like enemy that fires slow nebula spheres that deal high damage even with end-game armor.

In a Stardust area:
 * : The source of the Stardust area. It will attack by summoning white portals that spawn non ground enemies. Drops Stardust Fragments. The Summoner based pillar.
 * : Average speed flying enemies. When killed it splits into smaller Star Cells, and when given enough time, those become bigger Star Cells.
 * : Flies around,firing it's minions at you. When killed, it quickly fires all remaining minions at you.
 * : Small, crawling enemies. They create smaller versions called Twinkles to attack the player.
 * : Giant Worm like creatures, that can burrow, but still fly in the air when necessary. can only be hit in the head.
 * : A ground humanoid enemy. It has a chance to fire a mega laser at you.

After all Pillars are defeated:
 * : Currently Terraria's final boss. Has three eyes that need to be defeated before its core is revealed. The top eye fires a Phantasmal                            Deathray that inflicts massive damage. "Killing" an eye turns it into its invincible true form. Killing the core will in turn kill the Moon Lord. Drops many of the end-game loot.