Guide:King Slime strategies

From Calamity Mod Wiki
Jump to navigation Jump to search
King Slime
King Slime.png
Map Icon King Slime.png
Map icon
EnvironmentSurfaceSlime Rain
This attack will cause defense damage on hit. 40 / 64 Expert Mode / 80 Revengeance Mode / 88 Death Mode / 96 Master Mode
Max Life2000 / 2800 Expert Mode / 3570 Master Mode
KB Resist100%
Immune toConfusedPoisoned
Cold Bestiary Cold.png-
Water Bestiary Water.png-
Sickness Bestiary Sickness.pngResistant
Electricity Bestiary Electricity.png-
Heat Bestiary Heat.pngVulnerable
Coins 5 Gold Coin.png

King Slime is a pre-Hardmode boss. He is intended to be the first boss fought by the player and is considered the weakest of all bosses. Fighting him is optional and not required for game progression, but his defeat may reward the player with money and useful items.

This guide will mention items exclusive to Expert and Revengeance Mode with no special formatting and will follow the intended progression.

Terrain Preparation

A very long platform can make the fight with King Slime trivial as it will remove the need to dodge the Crown Jewel's attacks and deal with the Slimes that will spawn, leaving only the concern of King Slime despawning if the player gets too far.

Gearing Up

For a Normal and Expert Mode guide to King Slime, see King Slime strategies on the vanilla wiki.




  • A pair of Hermes Boots or any of its upgrades are heavily recommended so that the player can keep up with King Slime's pace.
  • Any double jump, preferably the Sandstorm in a Bottle or Blizzard in a Bottle, makes it significantly easier to dodge King Slime or his slime summons.
  • Magiluminescence is an incredibly powerful movement accessory, should the player be willing to gather the resources to craft it.
  • A Wulfrum Acrobatics Pack might come in handy if the player has built an arena suspended in the air, as it can allow them to quickly swing underneath King Slime to run in the opposite direction, if necessary.


  • Luxor's Gift is a great accessory that provides powerful damage boosts for all classes.
  • The Shark Tooth Necklace provides armor penetration, increasing the damage of all weapons. This is especially helpful for low-damage and fast-firing weapons such as the Minishark.
  • The Feral Claws are a good damage accessory for melee and summoner players due to their melee speed increase, as long as the summoner is utilizing Whips.
  • Mages can make use of the Magic Cuffs, as mana is vital this early in the game.
  • Summoners can boost their minion damage and durability with the Spirit Glyph.
  • The Coin of Deceit is great for stealth-based rogues.



  • The Amazon paired with a string accessory should make the fight simple for melee users.
  • The Starfury is also a good choice, having good range and DPS.
  • The Smoking Comet is one of the best yoyos available at this stage and has projectiles similar to the Starfury that can also hit the spawned slimes.
  • The Enchanted Sword is another good choice due to its ability to fire a projectile.
  • The Blade of Grass is a hard-to-use weapon, but with its increased size, it can be capable of good DPS as long as the player can maintain a middling distance or has the bulk to shrug off hits.
  • The Platinum Broadsword is a more powerful true melee option with a shorter range, making it harder to use effectively.
    • With both these weapons the player will have to deal with the Crown Jewel pestering them the whole fight, as it is impossible to hit it with true melee.
  • The Old Lord Claymore is a powerful movement option that deals good damage but can be difficult to obtain.


  • The Minishark is a good option for rangers, especially when paired with the Shark Tooth Necklace.
  • The Boomstick is another great option for rangers.
  • The Opal Striker is another potent option for rangers.
  • Any bow paired with Jester's Arrows is handy for dealing with King Slime's summons, while also doing decent damage to King Slime himself.
    • The Blood Rain Bow is a very strong consideration, as its raining blood bolts can make quick work of both the boss and its minions. However, it is better paired with Unholy Arrows due to their higher base damage.
  • The Magna Cannon is a very powerful weapon that can be slightly harder to obtain.


  • High-tier gem staves, especially the Amber Staff, should deal with King Slime relatively quickly.
  • The Wulfrum Prosthesis' secondary ability can be handy for a quick mana recharge, should it be necessary.
  • The Icicle Staff can be useful for dealing direct hits on King Slime because of its nimble projectiles.
  • The Frost Bolt tome is also a viable option for mages.


  • The Frost Blossom Staff is a great option, due to its instant projectile and splash damage.
  • The Sun Spirit Staff is slightly weaker but still useful for the same reasons.
  • The Wulfrum Controller is a decent choice for its flight and AI, in addition to relative ease of access.
  • The Stormjaw Staff is another good summon for this fight with its splashing sparks.
  • The Harvest Staff, while having difficulty hitting the Crown Jewel, can make quick work of King Slime and his minions with its rolling projectiles and piercing.
  • The Leather Whip can be considered, but it may have difficulty landing hits even at its longest range.
    • However, Snapthorn can trivialize the fight entirely, shredding the boss in seconds.


The Fight

This fight rundown will assume the player built their arena according to the Terrain Preparation section in this guide, and that they have Hermes Boots or its upgrades equipped.

King Slime will jump toward the player and summon slimes. Occasionally, he will perform a large jump and teleport to a spot closer to the player. When King Slime lands, this is usually a good time for true melee players to try and get their hits in, as King Slime will take a few seconds before teleporting without performing any attacks. However, King Slime will teleport regardless if the player gets too far away.

Run away from the boss to remove any possibility of getting hit by King Slime's jumps or summons. Flattened terrain, platforms, or decent movement can allow the player to handle this fight without building an arena.

At 50% health, King Slime will summon the Ruby Jewel Ruby Jewel. The jewel hovers above the player and pursues them, firing 1 Revengeance Mode / 3 Death Mode Jewel BoltJewel Bolts every 1.25 Revengeance Mode / 1 Death Mode seconds. To dodge the jewel's attacks, the player should not change their movement pattern and should continue running away from the boss. The jewel has little health, so if it is becoming troublesome, simply kill it.