King Slime

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King Slime
King Slime.pngOld-gen console version and 3DS version
Map Icon King Slime.png
Map Icon
Classic mode icon.png Classic
Expert mode icon.png Expert
Master mode icon.png Master
AI TypeKing Slime AI
Max Life2000/2800/3570
KB Resist100%
Immune toPoisonedConfused

King Slime Trophy.png"The lord of all things slimy."King Slime Trophy.png

King Slime is a pre-Hardmode boss. His appearance is that of a massive Blue Slime wearing a jeweled golden crown and has what appears to be a ninja inside of it. It lacks the crown on the Old-gen console version Old-gen console version and 3DS3DS version version of the game. As King Slime takes damage, he spawns additional ordinary Blue Slimes (and Spiked SlimesDesktop, Console, and Mobile versions in Expert and Master Mode) and will also appear to shrink in size.

King Slime spawns under one of the following conditions:

  • A player uses a Slime Crown.
  • Desktop, Console, and Mobile versions 150 slimes are defeated during the Slime Rain event (or 75 if King Slime was already slain in the world at least once).
  • Rarely in the outer lateral sixths of the map, during daytime, and only on grass.

Fighting King Slime is completely optional and not required for game progression, but his defeat may reward the player with money and useful items.

King Slime is also known as the weakest boss in the game. In Expert and Master mode he drops Royal Gel and it's particularly useful in the slime rain event so slime's don't attack you.

While King Slime is alive, the music Boss 1 will play. When Otherworldly music Desktop and Mobile versions is enabled, the track Boss 1 (Otherworldly) will play instead.

Spawning[edit | edit source]

Manual[edit | edit source]

King Slime can be summoned manually anywhere and at any time using the Slime Crown.

Random[edit | edit source]

King Slime has a very rare chance of spawning naturally if the following conditions are met:

  • The player is located in the one of the outer lateral sixths of the map (the far left or far right).
  • The Depth at its potential spawn point is above zero.
  • It is daytime.
  • There must be standard, green grass at its potential spawn point (off-screen; see NPC spawning)

Slime Rain[edit | edit source]

Desktop versionConsole versionMobile version Desktop/Console/Mobile-Only Content: This section's information applies only to the Desktop, Console, and Mobile versions of Terraria.
Main article: Slime Rain

If 150 slimes are killed by players, lava, traps, and/or summoned minions during the Slime Rain event, King Slime will spawn. Defeating the boss will end the event shortly after – if all players die (even on single player), the boss will despawn and the event will continue for some time before ending on its own (between 9-15 in-game hours). If the King Slime has already been defeated on a world, it will only take 75 slime kills to spawn the King Slime. If King Slime is summoned manually with the Slime Crown and then subsequently killed, while the Slime Rain is active, the event will end in the same way as if the player killed the King Slime that naturally spawns at the end of the event. This can be quite helpful for powerful players who want to get the Slime Rain event over with as quickly as possible.

Notes[edit | edit source]

  • Although being a large and resilient enemy, in addition to boss music playing during the fight, King Slime is often regarded as a "side-boss" or "mini-boss" (though there is no official word on this from the developers). It differs from traditional bosses in the following ways:
    • Desktop, Console, and Mobile versions King Slime can be encountered regardless of the current level of game advancement.
    • He is the only boss who takes damage from lava. (Besides 3DS version Lepus)
    • Old-gen console version3DS version King Slime does not travel or fire through blocks, which creates shielding or trapping possibilities that do not exist when battling most other bosses (though traveling too far from a trapped King Slime can cause him to teleport out).
    • He has certain spawning conditions that are more similar to those of regular enemies than those of bosses.
  • On the Desktop version Desktop version, Console version Console version, and Mobile version Mobile version, if the King Slime's target is unreachable, it will teleport upon the player. This can be performed from any distance and prevents easily trapping the boss within a small area.
  • King Slime's absolute highest jump can clear a 17-block-high wall.
  • In Expert ModeDesktop, Console, and Mobile versions, King Slime summons Spiked Slimes along with normal slimes as he loses health. Note that these are not affected by Royal Gel (unlike the other, normal Blue Slimes spawned).
  • King Slime can spawn inside of blocks, making him unable to move unless through teleporting.
  • It is possible for King Slime to teleport to the player after they died fighting in the outer layers of the world.

Achievements[edit | edit source]

Achievement Slippery Shinobi.png
Slippery Shinobi • Defeat King Slime, the lord of all things slimy.
Defeat King Slime for the first time. Desktop, Console, and Mobile versions

Tips[edit | edit source]

For more elaborate strategies on defeating King Slime, including weapon and arena recommendations, see Guide:King Slime strategies.
  • Piercing weapons can not only damage King Slime, but also kill the additional slimes it spawns.
  • The Blue Slimes it spawns can drop Hearts and Stars, which respectively restore 20 health and 100 mana.
  • Spawning King Slime while in specific areas using Slime Crowns can be a quick, easy way to farm for specific drops, such as Biome Keys, Console and Old-gen console versions 3DS version Souls, Pirate Maps, Halloween and Christmas drops, or Desktop, Console, and Mobile versions Cascade, Hel-Fire, Amarok, Yelets and Kraken yoyos, due to the high number of Blue Slimes spawned during the fight.
  • By using a Starfury while King Slime is falling down after jumping, it can take over 50 damage for each time he is hit by the star.
  • Note that King Slime itself does not drop any Gel, but the Blue Slimes it spawns do. This makes King Slime to be a good way to farm Gel, for Flamethrower ammo and Asphalt Blocks.
  • Killing King Slime on Expert Mode and selling all drops gives 10 on average.
  • When King Slime teleports, it can become stuck inside the blocks around him, preventing its movement for a while.

Trivia[edit | edit source]

  • It seems that the source of the Ninja armor is from the ninja inside King Slime. According to Redigit, the trapped ninja is the Guide's brother,[2] and he was consumed by King Slime as a result of losing the fight against the boss.[3]
  • In the Old-gen console version Old-gen console and 3DS3DS version versions, he is the only boss to drop a banner.
  • The trophy dropped by King Slime seems to be a Ninjatō covered in slime. (The Ninjatō is a common weapon which ninjas are usually shown to carry.) This may be because King Slime drops the Ninja armor.
  • The images for the ninja inside the King Slime and the crown are stored in separate image files. The King Slime's sprite without them looks similar to an enlarged sprite of a normal Blue Slime.
  • The sprite from 1.1 did not have the crown or the ninja.
  • Despite sometimes being considered the easiest boss in the game, it does the second highest damage of any pre-Hardmode boss, only beaten by the Wall of Flesh in Classic Mode or Skeletron in Expert Mode.
  • King Slime is the only boss capable of spawning randomly even after it has been defeated.
  • When teleporting, King Slime drops his current crown and seemingly generates a new one upon completing the teleport.
  • The Spiked Blue Slime, Pirate's CurseDesktop and Mobile versions, Jungle MimicDesktop, Console, and Mobile versions, and Golden SlimeDesktop version are the only non-invincible enemies in the game without a Bestiary entry, and the King Slime is the only boss whose summoned enemies do not have one.
  • The BestiaryBestiary entry for King Slime: "Slimes normally aren't intelligent, but occasionally they merge together to become a powerful force to swallow all things."

Gallery[edit | edit source]

See also[edit | edit source]

History[edit | edit source]

  • Desktop
    • A sprite for a crown added. Without the crown the sprite was King Slime (old).png.
    • New drops added.
    • Now has an Expert Mode AI.
    • Now teleports whenever stuck and when not in range of the player for over 5 seconds.
    • Can now spawn during the Slime Rain event.
    • Now drops the Solidifier.
  • Desktop 1.0.5:
    • Now floats in liquids and doesn't make a splash sound when hitting water.
    • Only one King Slime may spawn at a time now.

References[edit | edit source]

  1. 1.0 1.1 Information taken from the Desktop version Desktop source code, method RegisterBoss_KingSlime() in Terraria.GameContent.ItemDropRules.ItemDropDatabase.cs There may be inaccuracies, as the current Desktop version Desktop version is
  2. I'll take new lore for 200 Alex : Terraria May 14, 2020
  3. Terraria's 10th Anniversary: We are Re-Logic, Ask Us Anything! May 17, 2021