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⚔️ Core Keeper — Boss Progression Guide

Your complete walkthrough for every boss in Core Keeper 1.0, from your first slime to the Passage.

📋 Boss Progression Overview

# Boss Biome Recommended Gear Difficulty Unlock Requirement
1 🟢 Glurch the Abominable Mass Dirt Biome Copper tools ★☆☆ Find Glurch's summoning item
2 🟠 Ghom the Watery Mass Dirt Biome Copper tools ★☆☆ Find Ghom's summoning item
3 🧪 Hive Mother Larva Biome Tin gear, Iron recommended ★★☆ Defeat Glurch + Ghom
4 💀 Skelly the Skeleton King Clay Biome Tin gear, Iron recommended ★★☆ Defeat Glurch + Ghom
5 🌿 Azeos the Sky Titan Azeos' Wilderness Iron gear, Scarlet recommended ★★★ Defeat Hive Mother + Skelly
6 🐙 Omoroth the Sea Titan Sunken Sea Scarlet gear ★★★ Defeat Hive Mother + Skelly
7 🔥 Maluga the Sun Titan Forgotten Ruins Scarlet gear, Galaxite recommended ★★★★ Defeat Azeos + Omoroth
8 🌑 Ra-Akar the Titan Desert of Beginnings Galaxite gear ★★★★ Defeat Maluga
9 🕯️ The Passage Passage Galaxite+ gear ★★★★★ All titans defeated
10 🥚 Ivy the Poisonous Mass Larva Biome Tin gear ★☆☆ After Glurch (optional)

🟢 1. Glurch the Abominable Mass

Location & Unlock

  • Found in the Dirt Biome — look for a large arena-like clearing on your map
  • Craft a Glurch Summoning Idol at the Ancient Table: 10 Copper Bars
  • Place the idol in the arena to summon

Boss Stats

  • HP: ~1,200
  • Damage: ~20 (melee)
  • Movement: Slow, jumps toward you

Strategy

🏟️ Arena setup: Clear the area of blocks. Place 4-6 torches.
⚔️ Fight: Stay at mid-range. When Glurch jumps, dodge sideways.
🔥 Pro tip: Hit it 3-4 times, then back away — it telegraphs jumps.

🎁 Drops

Item Quantity Chance
Glurch Meat 3–5 100%
Large Glurch Meat 1–2 100%
Ominous Glurch Eye 1 100% → Craft Scarlet gear
Copper Bars 5–10 75%
Ancient Gemstone 1–3 50%
  • Weapon: Copper Sword or Bow (kite strategy)
  • Armor: Copper Armor Set
  • Food: Basic Cooked Meat or Berries
  • Healing: 5–10 bandages

🟠 2. Ghom the Watery Mass

Location & Unlock

  • Found in the Dirt Biome (opposite direction from Glurch)
  • Craft a Ghom Summoning Idol: 10 Copper Bars at Ancient Table
  • Place the idol in Ghom's arena

Boss Stats

  • HP: ~1,500
  • Damage: ~18 (ranged water blobs)
  • Special: Spawns smaller slimes when hit

Strategy

🏟️ Arena: Clear the area. Place torches for visibility.
⚔️ Fight: Kill the small slimes first before they multiply.
🔥 Pro tip: A Copper Bow makes this fight trivial — shoot from range.

🎁 Drops

Item Quantity Chance
Ghom Meat 3–5 100%
Watery Slime Core 1 100% → Craft Scarlet gear
Copper Bars 5–10 75%
Ancient Gemstone 1–3 50%

🧪 3. Hive Mother

Location & Unlock

  • Found in the Larva Biome (underground, past the dirt biome)
  • Auto-unlock after defeating both Glurch and Ghom — the Larva Biome opens up
  • No summoning idol needed — she's guarding the Larva Hive

Boss Stats

  • HP: ~4,500
  • Damage: ~35 (melee), ~25 (acid spit)
  • Special: Spawns larva minions, shoots acid pools

Strategy

🏟️ Arena: Create a small 2-block high tunnel to enter.
           Use the ceiling to block her charge attack!
⚔️ Phase 1: Kill larva spawns immediately to prevent overwhelm.
           Watch for acid pools on the ground — don't stand in them.
⚔️ Phase 2 (below 50% HP): She charges faster and spawns more larva.
           Use the tunnel entrance as a chokepoint.
🔥 Pro tip: Bring a Tin Shield. Block her charge then counter-attack.

🎁 Drops

Item Quantity Chance
Hive Mother Meat 3–5 100%
Larva Claw 2–4 100%
Hive Core 1 100% → Craft Iron gear
Ancient Gemstone 3–6 100%
  • Weapon: Tin Sword (melee) + Tin Bow of kiting
  • Armor: Tin Armor Set (minimum), Iron recommended
  • Food: Cooked Glurch/Ghom Meat or Hearty Salad
  • Consumables: 10+ bandages + 2-3 explosive traps

💀 4. Skelly the Skeleton King

Location & Unlock

  • Found deep in the Clay Biome (summoned via Ancient Skull)
  • Auto-unlock after defeating Glurch and Ghom — the Clay Biome entrance opens

Boss Stats

  • HP: ~5,000
  • Damage: ~40 (melee sword swings)
  • Special: Teleports, summons skeletons, shoots bone projectiles

Strategy

⚔️ Phase 1: Skelly swings a broad sword. Roll behind him after he attacks.
           Kill skeleton summons quickly with AoE swings.
⚔️ Phase 2 (below 50%): Summons MORE skeletons, teleports behind you.
           Watch for the teleport shimmer — roll away immediately.
🔥 Pro tip: Use the terrain pillars in Skelly's arena to block bone projectiles.

🎁 Drops

Item Quantity Chance
Skelly Meat 3–5 100%
Skeleton Bone 4–8 100%
Skelly's Skull 1 100% → Craft Iron gear
Ancient Gemstone 3–6 100%

🌿 5. Azeos the Sky Titan

Location & Unlock

  • Found in Azeos' Wilderness (surface biome, need passages from Clay/Larva boundaries)
  • Place the Azeos Summoning Idol (crafted at Ancient Table with Scarlet materials)

Boss Stats

  • HP: ~12,000
  • Damage: ~60 (melee stomp), ~45 (lightning beam)
  • Special: Flying phases, lightning strikes, ground pound AoE

Strategy

🏟️ Arena: Big open space. Remove all obstacles.
           Place campfires around the perimeter for healing zones.
⚔️ Phase 1: Hit Azeos' legs. Dodge the lightning beam sideways.
           When Azeos flies up, run — he'll ground-pound where you were.
⚔️ Phase 2 (below 50%): More lightning strikes, faster ground pounds.
           The sky darkens before lightning — 1 second to dodge.
🔥 Pro tip: Scarlet Bow with fire arrows. Ranged attacks during flight phase.
           Bring 20+ Greater Bandages.

🎁 Drops

Item Quantity Chance
Azeos Meat 3–5 100%
Sky Feather 2–4 100%
Storm Crest 1 100% → Craft Galaxite gear
Ancient Gemstone 5–10 100%
Azeos' Soul 1 100% → Summon Ra-Akar

🐙 6. Omoroth the Sea Titan

Location & Unlock

  • Found in the Sunken Sea biome (past Clay/Larva through water passages)
  • Place the Omoroth Summoning Idol

Boss Stats

  • HP: ~13,000
  • Damage: ~55 (melee tentacle), ~50 (water jet)
  • Special: Water jets, tentacle AoE, summons sea creatures

Strategy

🏟️ Prep: Bring a Diving Set or breathing potions.
           Omoroth's arena is partially underwater.
⚔️ Phase 1: Hit the tentacles when they surface.
           Dodge water jets by swimming behind pillars.
⚔️ Phase 2 (below 50%): Huge water jet AoE in center.
           Stay near edges, shoot from range.
🔥 Pro tip: Bring the highest-tier fishing rod to catch Glow Tuna.
           Cook them for underwater breathing buff food.

🎁 Drops

Item Quantity Chance
Omoroth Meat 3–5 100%
Sea Scale 2–4 100%
Tidal Crest 1 100% → Craft Galaxite gear
Ancient Gemstone 5–10 100%
Omoroth's Soul 1 100% → Summon Ra-Akar

🔥 7. Maluga the Sun Titan

Location & Unlock

  • Found in the Forgotten Ruins biome
  • Requires: Storm Crest (Azeos) + Tidal Crest (Omoroth) to craft summoning idol

Boss Stats

  • HP: ~18,000
  • Damage: ~75 (melee), ~60 (fire breath)
  • Special: Lava pools, fire breath cone, summoning fire spirits

Strategy

🏟️ Arena: Platforms in lava. Watch your footing!
⚔️ Phase 1: Hit the legs, dodge fire breath by running behind.
           Lava pools persist — don't let them trap you.
⚔️ Phase 2 (below 50%): Fire spirits spawn. Kill them FAST.
           Maluga slams the ground creating lava waves.
🔥 Pro tip: Galaxite Bow + water arrows do bonus damage.
           Wear heat-resistant food (Chilled Delight).

🎁 Drops

Item Quantity Chance
Maluga Meat 4–6 100%
Sun Fragment 2–4 100%
Ember Crest 1 100% → Craft Galaxite gear
Galaxite Ore 8–15 100%
Maluga's Soul 1 100% → Summon Ra-Akar

🌑 8. Ra-Akar the Titan

Location & Unlock

  • Found in the Desert of Beginnings (surface biome, through Sunken Sea)
  • Requires: Azeos's Soul + Omoroth's Soul + Maluga's Soul → craft Ra-Akar Summoning Idol

Boss Stats

  • HP: ~25,000
  • Damage: ~90 (melee), ~70 (void bolts)
  • Special: Void portals, teleporting, dark AoE projectiles

Strategy

🏟️ Arena: Large circular arena with void crystals.
           Destroy void crystals when they appear — they heal Ra-Akar.
⚔️ Phase 1: Ranged combat recommended. Dodge void bolt patterns.
           When Ra-Akar opens a void portal, run to the other side.
⚔️ Phase 2 (below 50%): Multiple portals, dark AoE orbs.
           Stay mobile. Destroy crystals IMMEDIATELY.
⚔️ Final phase (below 20%): Enraged. Non-stop void projectiles.
           This is a DPS race — use your best food and buffs.
🔥 Pro tip: Full Galaxite gear (minimum). Galaxite Bow + explosive arrows.
           Bring 30+ Greater Bandages and 5+ Healing Potions.

🎁 Drops

Item Quantity Chance
Ra-Akar Meat 5–8 100%
Void Shard 3–6 100%
Titan Core 1 100% → Craft endgame gear
Galaxite Ore 10–20 100%
Godly Gold 3–5 100%

🕯️ 9. The Passage (Final Boss)

Location & Unlock

  • Enter the Passage — the massive structure that appears at the center of the map
  • Requires: All 4 titans defeated (Azeos, Omoroth, Maluga, Ra-Akar)
  • This is the game's final boss and endgame area — a multi-phase gauntlet

Strategy

🏟️ Arena: Multi-room structure.
           Bring maximum supplies — you can't leave once inside.
⚔️ Phase 1 — The Gauntlet: Fight through waves of all previous minibosses.
           Resource management is key.
⚔️ Phase 2 — The Core: Face the Core itself — massive HP pool.
           Multiple attack patterns from all previous bosses combined.
⚔️ Phase 3 — The Escape: After defeating the Core, escape before detonation.
🔥 Pro tip: MAX GEAR — Galaxite+ upgraded. Best food buffs.
           Bring 50+ Greater Bandages, 10+ Healing Potions.
           Consider bringing a partner or summoning minions.

🎁 Drops

Item Quantity Chance
Core Fragment 3–5 100%
Galaxy Fragment 1–2 100%
Passage Key 1 100%
??? Endgame Items varies 100%

🥚 10. Ivy the Poisonous Mass (Optional Boss)

Location & Unlock

  • Secret boss in the Larva Biome (follow tunnels past the Hive Mother)
  • Unlock: After defeating Glurch, a hidden passage opens in the Larva Biome

Boss Stats

  • HP: ~3,000
  • Damage: ~30 (melee), ~20 (poison spit)
  • Special: Poison pools, poison status effect

Strategy

⚔️ Fight: Similar to Glurch + Ghom combined.
           Poison pools linger — stay mobile.
🔥 Pro tip: Antidote potions are useful here.
           Tin gear is sufficient, Iron makes it easy.

🎁 Drops

Item Quantity Chance
Ivy Meat 3–5 100%
Poison Sac 1–3 100%
Ancient Gemstone 1–3 50%

🗺️ Boss Progression Flowchart

Start → Defeat Glurch ─┬→ Defeat Ghom
                        │
                        ↓
            │   Hive Mother (Larva Biome)  │
            │   Skelly (Clay Biome)         │
            └── Defeat BOTH ───────────────┘
                        │
                        ↓
            │   Azeos (Wilderness)          │
            │   Omoroth (Sunken Sea)        │
            └── Defeat BOTH ───────────────┘
                        │
                        ↓
                  Defeat Maluga (Forgotten Ruins)
                        │
                        ↓
                  Defeat Ra-Akar (Desert of Beginnings)
                        │
                        ↓
            ╔═══════════════════════════╗
            ║  The Passage (Final Boss) ║
            ╚═══════════════════════════╝

🛡️ Gear Pro Progression Path

Stage Armor Weapon Accessories
Start Copper Copper Sword + Wooden Bow None needed
After Glurch/Ghom Tin Tin Sword + Tin Bow Movement Ring
After Hive/Skelly Iron Iron Sword + Iron Bow Health Ring
After Azeos/Omoroth Scarlet Scarlet Sword + Scarlet Bow Swift Ring
After Maluga Galaxite Galaxite Sword + Galaxite Bow Titan Ring
Endgame Galaxite+ (upgraded) Galaxite+ Great Sword The Core

💡 Pro Tips

  1. Build arenas! Before summoning any boss, clear the area and place campfires
  2. Food buffs stack — eat a meal, drink a potion, and apply a seasoning for triple buffs
  3. Partner selection — bring a Ranged partner (like the Hunter) for bosses, a Melee partner for clearing
  4. Sell extra boss drops — boss meat sells for good gold early game
  5. Ancient Gemstones — save these! You need 60+ for endgame gear crafting
  6. Statues matter — placing boss trophies gives permanent stat boosts in your base

Data sourced from Core Keeper 1.0 full release and gamepedia. Last updated July 2026.