Blood Moon



"The Blood Moon is rising..." A Blood Moon is a common randomly occurring event that takes place over the course of an entire night (7:30 p.m-4:30 a.m.) It causes several hazards for its duration: Enemy spawns increase, even near the player's Home and NPCs (where enemies do not normally spawn), Zombies become able to open Doors, and Bunnies, Penguins, and Goldfish transform into dangerous enemies, along with other effects (see below). Blood Moons are signaled by the message "The Blood Moon is rising..." in the lower left corner of the screen, and the moon, sky, water, and rain will appear red for the duration of the event. A reddish-pink filter will also be present in all above-ground areas.

A Blood Moon will only occur if at least one player in the world has at least 120 life (six hearts), and only on nights when a moon is present (any night except a new moon). Given those criteria, a Blood Moon has a 1 in 9 chance (11.11%) of occurring.

Enemies

 * The spawn rate of enemies on the surface increases., , The Groom, , and the Clown (if in Hardmode) have a chance to spawn. Enemies not only spawn faster, but more are spawned than can normally exist on-screen at once. This works no matter the environment, so Corruption and Crimson enemies can also swarm even more than they normally would, for example.
 * Enemies can even spawn near NPCs and their houses, whereas those usually suppress enemy spawns. Player-placed walls are not necessarily safe during this event.
 * Zombies and their counterparts can open Doors.
 * Goldfish become Corrupt Goldfish/, Bunnies become Corrupt Bunnies/, and Penguins become Corrupt Penguins/. Those spawned from Statues are Corrupt/Crimtane or Vicious, and they do not revert to regular Goldfish or Bunnies after the Blood Moon is over. If it is raining during the event, transformed Goldfish will flop around on the ground, rather than walking.

Sold items

 * The Merchant sells Throwing Knives.
 * The Arms Dealer sells Silver Bullets (Pre-Hardmode. In Hardmode, the Arms Dealer will always sell Silver Bullets).
 * The Clothier sells the Mime Mask, and.
 * On the, he will also sell George's Tuxedo for male players, and the Fabulous Outfit for female players.
 * The Dryad stops selling Purification Powder, Sunflowers, and Grass Seeds.
 * If the Corruption is present, she will sell Vile Powder and Corrupt Seeds.
 * If the Crimson is present, she will sell and Crimson Seeds.
 * On the, she will also sell Sparkly Wings during Hardmode.
 * The Painter sells the Evil Presence painting.
 * The Steampunker sells Purple Solution if the Corruption is present, or Red Solution if the Crimson is present instead of Green Solution.
 * The Cyborg sells Rocket II ammunition.
 * The Skeleton Merchant sells the during Hardmode.

Other effects

 * Deathweed blooms. Blood moons (and Full Moons on ) are the only times you can harvest Deathweed Seeds from Deathweed.
 * Most NPCs have their own unique lines commenting on the event. All female NPCs except for the Party Girl act annoyed or rude.
 * As said before, water will turn red, including Rain. A red filter will be applied to the screen as well, shifting the colors of all entities and light towards red and purple shades. This will also affect the projectile colors of many weapons.

Tips

 * A Blood Moon only affects the surface. Players can avoid it entirely by staying underground.
 * During a blood moon in Hardmode, every enemy has a 1 in 1000 (0.1%) chance of dropping the KO Cannon.
 * Simply placing a block in front of a door will prevent zombies being able to open the door.
 * If you see the notification that a Blood Moon is rising, get underground as quickly as possible. Going indoors will not save you. Neither will standing around outside. The Blood Moon gives enemies dangerous abilities, such as the ability to open doors or the ability to spawn within player-placed walls.
 * Although the Blood Moon is typically treated as a deadly event, it is possible to enjoy the event. To prepare, find some Life Crystals and increase your health as much as possible. Then craft or buy (or find) a weapon with fast speed, good knockback, and good strength. Then, when the Blood Moon rises, go on a monster killing spree. Since there are new enemies during a Blood Moon, try launching a hunt for these new enemies.
 * If you don't have an underground shelter for whatever reason (perhaps the Blood Moon caught you off guard and you've never had one before) than grab your best weapon, consume any Life Crystals you may own, and stand on the roof of your home to battle away the monsters. It sounds crazy but it keeps the zombies from breaking into your house and it's not more dangerous than staying in your home. During a Blood Moon, monsters can spawn within player placed walls.
 * Now that you've read this page and learned some things about the Blood Moon, go back to your Terraria world and PREPARE for the next Blood Moon in whatever way you see fit.
 * How you prepare depends on what you want to do during your next Blood Moon. If you're too scared and want to hide and wait it out, dig an underground shelter. If you want to stay on the surface (perhaps to hunt for all the new, unique enemies? Or to defend your home from wave after wave of monsters?) than prepare by getting strong weapons, stronger armor, and increasing your maximum life. It wouldn't hurt to increase your mana too... ;)

Trivia

 * In real life, the Moon appears red during lunar eclipses, and is sometimes referred to as a "Blood Moon". As sunlight passes into the shadow through the atmosphere, the Moon is given a red/orange color due to the amount of air the light passes through. This is the same phenomenon that gives sunsets and sunrises such colors.
 * Because of the celestial significance of the moon in Earth's sky, combined with its tendency to change its apparent color, the moon symbolically or literally turning the color of blood is a recurring theme in historical and popular contexts, repeatedly appearing in books, movies and video games as an ill omen- and often being treated as one when it occurs in real life.
 * One of the earliest references to a blood moon appears as one of the "Seven Signs of the Apocalypse" in the biblical book of Revelation, which states, "And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood;..."
 * When a real Blood Moon occurred on April 14, 2014, a warning was jokingly announced on the official Terraria forums.
 * During a Blood Moon, most female NPCs use more irritable or aggressive dialogue than normal. This may be a reference to the menstrual cycle.

History
血月 血月 Lune de Sang 블러드_문 Krwawy_Księżyc Blood_Moon Кровавая_луна