Core Keeper • Boss Guide

Glurch the Abominous Mass

Biome: The Dirt Biome HP: Standard Last updated: 2026-02-28

How to summon / find

Found naturally in the Dirt Biome on a large slime sigil.

Recommended food focus

Pick one main meal plan that fits this fight, then keep one backup plan (survival or extra damage).

Boss Damage Melee Speed.

Prep checklist

Bring these before you start—this is the fastest “stop dying” layer.

  • Iron Armor
  • Swiftness Potion
  • Basic Healing Potions
  • Clear surrounding slimes

Deadly attacks to dodge

If you learn only 3 things, learn these. They cause most wipes.

Leap Slam
Jumps high and lands on player.
How to dodge: Move out of the red shadow circle immediately.
Enrage
Increases jump frequency when low health.
How to dodge: Keep moving and don't stop to attack for too long.

Core mechanics

Giant orange slime that leap slams players. Found ~65 tiles from The Core.

Win strategy

Dodge the leap shadow immediately and counter-attack while he recovers.

Best food for this boss

Pick 1 meal from the primary plan. If you’re dying, switch to the backup plan instead of forcing DPS.

View all tier lists →

Primary plan

Top pick
Larva Meat + Golden Puffungi
  • • boss damage: +30%
  • • rarity boost: +1 Tier
Tip: avoid overlapping buffs—pick a focused combo.
Top pick
Larva Meat + Starlight Nautilus
  • • boss damage: +30%
  • • rarity boost: +1 Tier
Tip: avoid overlapping buffs—pick a focused combo.
Top pick
Bomb Pepper + Larva Meat
  • • move speed: +21%
  • • boss damage: +30%
Tip: avoid overlapping buffs—pick a focused combo.
Top pick
Heart Berry + Larva Meat
  • • max health: +25
  • • health regen: +2.2 HP/s
  • • boss damage: +30%
Tip: avoid overlapping buffs—pick a focused combo.

Backup plan

Backup pick
Mold Shark + Iron Tail
  • • melee damage: +38.6%
  • • crit chance: +13%
Backup pick
Mold Shark + Emerald Feather Fish
  • • melee damage: +38.6%
  • • crit chance: +7%
Backup pick
Mold Shark + Golden Puffungi
  • • melee damage: +38.6%
  • • rarity boost: +1 Tier

Common mistakes

Read this if you keep failing. It’s usually one of these.

  • Standing still during jumps
  • Not clearing the small slimes first
  • Fighting without armor

Key drops

What you’re actually here for—and what it’s used for.

Slime Oil
Summons the Slime Merchant.
Glurch Chest
Large storage container.

Need golden ingredients faster?

Farming by hand slows down progression. Automate golden crops to power your best food buffs.

Auto-farm guide →

Related

FAQ

What food should I bring to Glurch the Abominous Mass?
Bring 1 main plan (damage or survival) plus 1 backup plan. Avoid overlapping buffs—buffs of the same type usually get overwritten by the last meal you eat.
Do food buffs stack in Core Keeper?
Not usually. Buffs of the same type tend to overwrite, so pick a focused combo instead of stacking many similar meals.
How do I farm ingredients faster?
Automate crops. A golden crop farm is the fastest way to remove the cooking grind for endgame buffs.