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King Slime

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v50King Slime
NPC 50
Type Monster ­
Sub Type Boss Monster
HP 2000 Heart
Rarity Rare
Attack 40
Defense 10
Spawn Time 1:300 chance of replacing a normal slime during Sun (Day)
Spawn Area Surface
Summoned By Slime Crown
King Slime Mask 14.29%
Slime Hook 50%
Slimy Saddle 0.03%
Slime Gun 50%
King Slime Trophy 10%
Only one of the following will be dropped: 100%
Ninja Hood
Ninja Pants
Ninja Shirt

The King Slime is a boss that spawns randomly and can be found in caves as well as on the surface. The boss can also be spawned by using the Slime Crown, which can be crafted from 99 gel and a Gold Crown at a Demon Altar.

It has 2000 HP when spawned. When damaged, Blue Slimes will break off of it and the King Slime itself progressively shrinks in size. It drops a random piece of the Ninja Set upon death.

Terraria King Slime Ninja Outfit03:14

Terraria King Slime Ninja Outfit

The chance of a King Slime appearing in the place of any other slime is 1:300, and holding a Water Candle will improve the spawn chance of King Slime. The King Slime is not immune to lava. Dynamite works very well against the King Slime, but is difficult to mobilize correctly as the King Slime is large and difficult to trap.

A method to quickly spawn a King Slime is to make a brand new (preferably small) map, get to one of the edges of the home biome (about 1/3 away from spawn) and stop in the last place with grass before a new biome begins. Using a Water Candle gives one a 0.48% higher chance of spawning a King Slime.

An equally advisable method is to build a Sky Bridge going to the very end of the world. Plant a Grass Seed and wait for it to cover the dirt, or one may use the Staff of Regrowth to save time and money. Stand at the edge of the world, this will increase the chance of the King Slime spawning as the player is farther from spawn.


An advisable strategy for beginners is to make a 10x14 box in the ground and box yourself in (you may need Shiny Red Balloon, Grappling Hook/Ivy Whip, or a Cloud in a Bottle to get out,) now use the speed glitch and wait for the boss music, or hold a Water Candle, or both. When the King Slime comes, cut yourself a way out 3 blocks tall on one of the sides, and then cut away the top, all the while dodging the King Slime, wait for it to fall in, and then close off the top. Go down to where you exited the box, and start attacking it. The King Slime WILL NOT be able to damage you, and the only problem will be the blue slimes, which will easily die to the Muramasa or other swords. You can also make a 2 block hole in the the ceiling after trapping it and do this: Pull out a flail (Blue MoonBall O' HurtSunfury) then throw it down the hole with the mouse held down. The flail will deal constant damage to the king slime, as long as you don't fall through the hole.

An alternate strategy is to make a T shaped tower at least 11 blocks tall, as shown in the gallery. At this height, ground based mobs can't touch you and even the King Slime can't get itself into the "airlock." However, you may need to have a weighted weapon or a boomerang, as if you stand in the airlock, the King Slime might still be able to damage you.

You can place two blocks above your head with a two block space in between and the King slime cannot reach you (however the blue slimes that are knocked off of the King Slime can still reach you). You then can swing at it from the all directions.If you go up high with your rocket/spectre boots you will take  damage from the fall and you will get hurt by landing on the king slime.

The King Slime can't swim, so a good idea would be to make a deep pool (About 5 blocks deep) and make it at least 10 blocks long. The King Slime will be under-water with you while the blue slimes float up to the surface of the pool. Giving you time to kill the King Slime while avoiding the blue slimes until the end of the battle.


  • It is possible to glitch spawn the King Slime by speeding up time using the Speed Glitch. The Speed Glitch will allow you to speed up time while the Terraria window is minimized. Terraria will still be running while minimized and by listening to the music, you can determine when a King Slime has spawned. This is a very fast method to get the ninja set.
  • Another glitch is to trap the King Slime in a cell, and then create a barrier around him. Then, take sand, and place it through a single hole in the top of the cell. Once the whole thing is filled (Although probably it shouldn't be needed), he will start to clip through the ground when he jumps.
  • It is possible for two or more King Slimes to spawn at the same time.
  • Dryad will not spawn after defeating King Slime.


  • In Ninja Gaiden, one of the first bosses is a giant slimy monster that devours you. If you look closely in the center of the King Slime you'll see there is a ninja trapped inside. Armor that resembles Ryu's is the one that King Slime drops, so it might be a reference to that boss. While the King Slime jumps it seems like the ninja moves along with the slime.
  • King Slime was also the name of a boss in the MMORPG Maplestory, which Terraria shares other elements with.
  • There is also a rare monster called a "King Slime" in the Dragon Quest Series, although it bears little resemblance to Terraria's.
  • This is the largest slime in Terraria.

Update Info




  • Multiple King Slimes should no longer spawn simultaneously.
  • Now floats in liquids and doesn't make a splash sound when hitting water.


  • Added to the game.


Slime Monsters Baby Slime · Black Slime · Blue Slime · Corrupt Slime · Dungeon Slime · Green Slime · Illuminant Slime · Jungle Slime · Lava Slime · Mother Slime · Pinky · Purple Slime · Red Slime · Shadow SlimeConsole · Slimeling · Slimer · Toxic Sludge · Yellow Slime
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Undead Monsters Angry Bones · Armored Skeleton · Big Boned · Dark Caster · Doctor Bones · Heavy Skeleton · Short Bones · Skeleton · Skeleton Archer · The Groom · Tim · Undead Miner · Vampire MinerConsole · Zombie


Chaos Elemental · Clown · Dark Mummy · Light Mummy · Mummy · Possessed Armor · Shadow MummyConsole Spectral ElementalConsole · Spectral MummyConsole · Werewolf
Mages Dark Caster · Fire Imp · Goblin Sorcerer · Tim
Plant Monsters Dragon SnatcherConsole · Clinger · Man Eater · Snatcher
Burrowing Monsters Bone Serpent · Devourer · Digger · Giant Worm · World Feeder
Flying Monsters Arch DemonConsole · Big Eater · Big Stinger · Bird · Cave Bat · Corruptor · Cursed Hammer · Cursed Skull · Demon · Demon Eye · Dragon HornetConsole · Dragon SkullConsole · Dragon StingerConsole · Eater of Souls · Enchanted Sword · Gastropod · Giant Bat · Harpy · Hellbat · Hornet · Illuminant Bat · Jungle Bat · Little Eater · Little Stinger · Meteor Head · Pixie · Shadow HammerConsole · Spectral GastropodConsole · Voodoo Demon · Vulture · Wandering Eye · Wraith
Swimming Monsters Angler Fish · Blue Jellyfish · Corrupt Goldfish · Goldfish · Green Jellyfish · OrcaConsole · Pink Jellyfish · Piranha · Shark
Hopping Monsters Bunny · Corrupt Bunny · Mimic · Slimes
Boss Monsters Arch WyvernConsole · Eater of Worlds · Eye of Cthulhu · OcramConsole · King Slime · Skeletron · Skeletron Prime · The Destroyer · The Twins · Wall of Flesh · Wyvern
Boss-Related Monsters Dungeon Guardian · Leech · Probe · Servant of Cthulhu · Servant of OcramConsole · The Hungry
Immortal Blazing Wheel · Spike Ball
Projectile Burning Sphere · Chaos Ball
Other Albino AntlionConsole · Antlion · Crab · Snowman Gangsta · Mr. Stabby · Snow Balla · Unicorn

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