Overview
King Slime is a Pre-Hardmode boss in Terraria. This guide pulls together the official spawn rules, drop table, and progression context so you can decide when to attempt the fight and what to bring.
How to summon
Slime Crown, kill 150 slimes in a Slime Rain, or rare overworld spawn.
Notable drops
- King Slime Trophy (1 in 10)
When to fight
Recommended progression slot: Pre-Hardmode. You should have full gear from the previous tier before attempting this fight, including a top-tier prefix on your weapon (see the item page → Best prefixes).
What to bring, by class
Top-damage Pre-Hardmode-tier weapons from the registry for each class — open any item for full DPS, use-time and prefix data.
Arena and prep
A prepared arena wins most of the fight before it starts:
- Lay 2–3 long wooden-platform rows for vertical dodging room.
- Drop a Campfire and Heart Lantern (and a Honey pool) for passive regen.
- Set up the buff stations for your class — Ammo Box, Crystal Ball, Bewitching Table, Sharpening Station.
- Pre-buff with the strongest potions you can craft: Ironskin, Regeneration, Endurance, plus a class-damage potion.
- Reforge your main weapon to Menacing (offense) or Warding (survival) before pulling the boss.
After the fight
Clearing King Slime typically opens the Early Hardmode tier — new gear, ores and enemies come into reach. Next targets: Queen Slime, Pirate Ship. See the progression checklist for the full order.