The Bosses in Core Keeper are challenging, large, and aggressive enemies that can easily catch players off guard. You need to have proper strategies and conquer your fears to defeat the Bosses of Core Keeper. While beating all the bosses may be optional, it does open the gateway for valuable loot for you. To explore more about the notorious Core Keeper bosses and get full information follow the guide below. Keep in mind that the rewards listed are all possible drops and based on % rolls, you may need to farm a boss to get a specific item from that list.
In This Post
Full List Of All Bosses in Core Keeper
Each boss in Core Keeper has a particular method for summoning. You will encounter some bosses naturally during your gameplay progression whereas some by the placement of specific Boss-Summoning items in a specific area. After defeating a boss, you will be rewarded with randomized loot, such as armor, accessories, weapons, and materials. You can farm the bosses to get specific loot items.
There are a total of 17 bosses in Core Keeper (19 including seasonal variants). We will be revealing the locations, attack patterns, and the rewards for all 17 in this guide.
- Glurch the Abominous Mass
- Ghorm the Devourer
- King Slime
- The Hive Mother
- Malugaz the Corrupted
- Azeos the Sky Titan
- Ivy the Poisonous Mass
- Omoroth the Sea Titan
- Morpha the Aquatic Mass
- Ra-Akar the Sand Titan
- Igneous the Molten Mass
- Atlantean Worm
- Druidra the Wild Titan
- Crydra the Ice Titan
- Pyrdra the Fire Titan
- Core Commander
- Urschleim
Seasonal Variants:
- Haunted Hive Mother
- Awakened Azeos
1. Glurch the Abominous Mass
You will find Glurch the Abominous Mass as your very first encounter in Core Keeper. It is a giant, orange-colored slime found within the undergrounds, precisely 65 titles from the core covered in slime.
You will hear a loud thumping sound and your screen will start to shake when Glurch is nearby. After defeating this giant you can re-summon it by placing a Giant Slime Summoning Idol on their rune.
Attacks
Glurch will quickly leap towards you and will attack you. It will try to damage you by squishing its target by bouncing. Glurch deals about 50 damage per hit and becomes enraged when its health declines to 30% while increasing its attack intensity on the player.
Loot Drops
Once you have successfully defeated Glurch, you will be rewarded with the following items and the next phase of the game will open for you:
- Glurch Chest
- Glurch Eye
- Slime Oil
- Melting Crystal Ring
- Blob Rosary Necklace
- Wooden Shield
- Swift Feather
- Slime
- Ancient Gemstone
- Mechanical Part
- Copper Ore
- Tin Ore
- Melting Crystal Ring
- Blob Rosary Necklace
- Wooden Shield
- Swift Feather
- Glurch Figurine
2. Ghorm the Devourer
Ghorm the Devourer can be found around the Clay Caves and the Forgotten Ruins. It is a giant larva that travels in a circle and doesn’t stay in one place. It roams around the entire map, making it difficult for pinpointing its exact location.
Attacks
If you decide to get into Ghorm’s way, it will eventually try to harm you. Ghorm will enrage at 80% health and will start targeting you with higher force.
Loot Drops
- Ghorm Chest
- Ghorm’s Horn
- Larva Meat
- Ghorm’s Stomach Bag
- Mysterious Idol
- Larva Ring
- Larva Chest
- Tin Axe
- Flintlock Musket
- Ancient Gemstone
- Mechanical Part
- Fiber
- Iron Ore
- Gold Ore
- Shiny Larva Meat
- Larva Ring
- Larva Chest
- Tin Axe
- Flintlock Musket
- Ghorm Figurine
- Amber Larva
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3. King Slime
King Slime in Core Keeper is a boss from the crossover update with Terraria. It is a giant blue slime that can be summoned by placing a Crown Summoning Idol on any Slime Summoning Rune – Glurch, Ivy, or Morpha. You can easily access these items by killing slime-type enemies.
Attacks
Attacking King Slime is tricky as it will leap towards you, damaging wherever it will land. It shares a similar attack pattern as of other slime bosses in Core Keeper. For every 700 health the slime losses it will summon one Royal Slime, so you better watch out for that.
Loot Drops
- King Slime’s Chest
- King Slime Crown
- Royal Gel
- King Slime Figurine
- Terraria – Journey’s Beginning
- Healing Potion
4. The Hive Mother
It is a large mass found at the center of a Larva Hive Biome. You will sense its presence once you enter a large open space in the biome. The Hive Mother is a stationary Boss, which summons larvae that can fill its surroundings very quickly. You need to strategies and be alert in the battleground otherwise the large amount of larvae might result in your quick death.
Attacks
The Hive Mother will spew acid in your direction. It will also summon Big Red and Red Larvae. You will experience its whole wrath when its health reduces to 60%.
Loot Drops
- Hive Mother Chest
- Heart of the Hive Mother
- Larva Meat
- Clot Ring
- Grub Egg Necklace
- Larva Helm
- Hand Mortar
- Broken Handle
- Battle Axe
- Ancient Gemstone
- Fiber
- Iron Ore
- Gold Ore
- Grub Knot
- Clot Ring
- Grub Egg Necklace
- Larva Helm
- Hand Mortar
- Broken Handle
- Battle Axe
- Hive Mother Figurine
5. Malugaz the Corrupted
You will find Malugaz the Corrupted in the Throne Room within Forgotten Ruins. It is a large caveling shaman who appears as an armored hooded being with spiked shoulders.
In the Throne Room, place the skull of the corrupted shaman at the center to summon Malugaz. One of the most important things is fighting this boss is optional and won’t affect your gameplay progression even if you decide to skip the battle.
Attacks
The Malugaz has two phases unlike other bosses from Terrarria. In the first phase it will alternate between two attacks:
- Throwing two or three fireballs in your direction while combating.
- Summoning a fiery wall around the area.
You cannot defeat this boss by simply whittling its health through attacks. As, it will enter into its second phase where it will attack very fiercely. It will have two attacks:
- It will teleport itself around the place and appear next to you while in combat.
- It will create fiery tiles after teleporting itself next to you.
Loot Drops
- Ancient Chest
- Skull Ring
- Skull Necklace
- Blue Leather Tome
- Ritual Dagger
- Ancient Gemstone
- Mechanical Part
- Gold Bar
- Fireball Staff
- Hand Mortar
- Battle Axe
- Skull Ring
- Skull Necklace
- Blue Leather Tome
- Ritual Dagger
- Ritual Goblet
- Oracle Card “Entity”
- Caveling Skull
- Small Caveling Skull
- Blood Skull
- Malugaz Figurine
6. Azeos the Sky Titan
As you explore the Core, you will eventually lead to a battle with Azeos the Sky Titan, who is the first of the three titan bosses in Core Keeper. You will find Azeos residing in the Azeos’ Wilderness biome.
Attacks
In comparison to other bosses, Azeos has more attacks than many other bosses. While battling this boss you will need to deal with the following problems.
- You will face a thunder beam that will close in on your position from left and right.
- Another thunder beam will close in on your position from top and bottom.
- A thunder beam cluster will appear and each of them will be moving in a unique direction.
- A thunder beam will appear from the ring before spreading out.
- You will see multiple blue crystals that can only be destroyed with a pickaxe or an explosive.
Loot Drops
- Titan’s Chest
- Pile of chum
- Radical Rabbit Ears
- Eostre Necklace
- Ostara Ring
- Awakened Azeos Figurine
- Broken Handle
- Azeos Beak Necklace
- Sky Ring
- Ancient Pickaxe
- Azeos’ Dash Feather
- Ancient Gemstone
- Scarlet Ore
- Gold Ore
- Petrified Egg
- Broken Handle
- Azeos Beak Necklace
- Sky Ring
- Ancient Pickaxe
- Azeos’ Dash Feather
- Azeos Figurine
7. Ivy the Poisonous Mass
Ivy’s appearance resembles Glurch the Abominous Mass. You can find Ivy in the same biome as Azeos – Azeos’ Wilderness biome, approximately 600 tiles from The Core in an area covered with slime. You can easily locate it by using Ivy the Poisonous Mass Scanner.
You will hear a loud thumping sound and your screen will start to shake when Ivy is nearby. After defeating Ivy, you can re-summon it by placing a Giant Slime Summoning Idol on its rune.
Attacks
Ivy will quickly leap towards you, damaging you while landing. Occasionally the Ivy will pause and shoot poison mortars from the sky. On declining health, Ivy will spawn a poison slime.
Loot Drops
- Ivy’s Chest
- Ivy’s Ring
- Poisonous Sickle
- Remedaisy Necklace
- Ivy’s Pants
- Ivy’s Thorn Harness
- Toxic Defender
- Poison Slime
- Scarlet Ore
- Gold Ore
- Ancient Gemstone
- Mechanical Part
- Ivy Figurine
8. Omoroth the Sea Titan
As the name suggests, Omoroth is a giant boss with an octopus-like appearance. You will find Omoroth in the Sunken Sea biome. To summon this boss you need to use the Expert Lure in one of the biome’ whirlpools. As it has multiple tentacles which you easily defeat to make the combat little easier.
Attacks
Omoroth during battle will spit large whirlwinds that will blow away from its main body. It will simultaneously submerge and reappear in another whirlpool in the area. You can also easily get hit by its tentacles if you go too close.
Loot Drops
- Floating Titan’s Chest
- Omoroth’s Necklace
- Omoroth’s Ring
- Omoroth’s Beak
- Omoroth’s Helm
- Omoroth’s Chestplate
- Omoroth’s Leg Armor
- Ancient Gemstone
- Octarine Ore
- Gold Ore
- Giant Squid Eye
- Omoroth’s Necklace
- Omoroth’s Ring
- Omoroth’s Beak
- Omoroth’s Helm
- Omoroth’s Chestplate
- Omoroth’s Leg Armor
- Anchor Axe
- Omoroth Figurine
9. Morpha the Aquatic Mass
Morpha the Aquatic Mass is a similar type of slime boss as Glurch and Ivy. The only difference is its blue appearance. You can find it in the same biome as Omoroth, i.e. Sunken Sea biome. To find this boss you just have to buy and use the scanner from the Spirit Merchant.
Attacks
Morpha has a similar attack pattern on the battleground as of Glurch and Ivy. What makes this boss more dangerous is that it has a larger health pool and can deal far larger amounts of damage than the two other slime bosses.
Loot Drops
- Morpha’s Chest
- Morpha’s Ring
- Coral Ring
- Slime Helm
- Slime Armor
- Slippery Slime Sword
- Morpha’s Bubble Bag
- Slippery Slime
- Octarine Ore
- Gold Ore
- Ancient Gemstone
- Mechanical Part
- Morpha’s Ring
- Coral Ring
- Slime Helm
- Slime Armor
- Slippery Slime Sword
- Morpha’s Bubble Bag
- Morpha Figurine
10. Ra-Akar the Sand Titan
Staying true to its name Ra-Akar the Sand Titan is one of the toughest bosses in Core Keeper You can easily find it within the Desert of Beginnings. It appears as a giant scarab beetle and its behavior and damage output fall short of Igneous the Molten Mass. To summon the boss you are required to place a Thumper in the middle of its den in the Desert of Beginnings biome.
Attacks
There are a total of 4 attacks that you might face while battling the Ra-Akar:
- Burrows and rages across the battlefield
- Sand whirlpools
- Glowing orbs that follow the player around the arena.
- Summoning scarabs to accompany it in fight.
Loot Drops
- Titan’s Chest
- Ra-Akar’s Necklace
- Scarab Visor
- Scarab Harness
- Scarab Legs
- Ancient Gemstone
- Galaxite Ore
- Crystal Spearhead
- Desert Diamond
- Ring of Sand
- Ra-Akar’s Necklace
- Scarab Visor
- Scarab Harness
- Scarab Legs
- Ra-Akar Figurine
More Core Keeper Guides For You:
- How To Farm Monsters In Core Keeper
- How To Make A Boat In Core Keeper
- Where To Find Clear Gemstone In Core Keeper
11. Igneous the Molten Mass
Igneous is a giant magma slime found within the Molten Quarry. Finding Igneous is similar to finding other slime bosses. All you need to do is look out for screen shakes and use those instances to triangulate the boss’ location.
Attacks
Igneous might not boast several attacks but getting hit by its gelatinous-like body can spell doom you. Even this boss shares the maximum health similar to Ra-Akar. It will try to slam you using its body. Igneous will jump around the battlefield as part of its combat pattern.
Loot Drops
- Igneous’ Chest
- Magma Horn Armor
- Magma Torso Armor
- Magma Shin Armor
- Scorching Aegis
- Burnzooka
- Magma Slime
- Ancient Gemstone
- Galaxite Ore
- Cipher Parchment
- Magma Horn Armor
- Magma Torso Armor
- Magma Shin Armor
- Scorching Aegis
- Burnzooka
- Igneous Figurine
12. Atlantean Worm
You can find Atlantean Worm easily within the Sunken Sea Biome. Similar to the Ghorm the Devourer, you have to travel in a circular path around the Sunken Sea. You can easily access its location through the map using an Atlantean Worm Scanner.
Attacks
You can’t attack Atlantean until it is properly summoned using a Bait Pillar. Once summoned it will attack you with its mouth and spikes. It charges with an energetic attack that might break into lots of balls in a circular pattern. If you are able to weaken Atleantean by damaging its weak spot, it will split out a shorter Atlantean Worm.
Loot Drops
- Atlantean Worm Chest
- Atlantean Worm Heart
- Atlantean Worm Sword
- Atlantean Worm Ring
- Atlantean Worm Necklace
- Atlantean Worm Helmet
- Ancient Gemstone
- Bottom Tracer
- Silver Dart
- White Coralotl
- Beryll Angle Fish
- Jasper Angle Fish
- Cosmic Form
- Atlantean Worm Figurine
- Atlantean Worm Sword
- Solarite Ore
- Atlantean Worm Ring
- Atlantean Worm Necklace
- Atlantean Worm Helmet
- Atlantean Worm Heart
- Scholar Satchel
- Sun Caller
13. Druidra the Wild Titan
Druidra the Wild Titan can be found within Azeos’ Wilderness Biome. It is one of the fourth of the six titan bosses. To unlock it you have to first power The Core. You can summon it by placing a Wind Organ of Wilderness close enough to it. You can navigate to its location easily with the help of Druidra the Wild Titan Scanner. Defeating it will unlock the Soul of Druidra.
Attacks
Druidra the Wild Titan has four distinct attack patterns:
- If you are close enough then it will slam down to the ground, dealing damage to you. You will hear a hissing sound before it will attack you.
- Druidra will fire a yellow beam from its mouth.
- It will summon some thorns beneath you. After a short while, the thorns will extend and damage you and immediately.
- Roaring to the sky, and making several blocks fall from the sky while pulling you toward it. At the same time, wind effects will appear on the ground indicating the damaging area of the upcoming shockwave. Following the attack, it will create a shockwave.
Loot Drops
- Pink Hydra Eye
- Jungle Emerald
- Hydra Tooth
- Hydra Bone Shins
- Druidra’s Ring
- Solarite Ore
- Ancient Gemstone
- Scarlet Ore
- Druidra Figurine
- Hydra Tooth
- Hydra Bone Shins
- Druidra’s Ring
- Amber Chunk
- Beast Booster
- Ricochet Shuriken
- Mold Shell
- Arcane Monk Cloak
- Arcane Monk Blindfold
- Arcane Monk Leggings
- Scholar Satchel
- Sun Caller
14. Crydra the Ice Titan
Crydra the Ice Titan can be found within the Sunken Sea Biome. It is on the fifth number of six titan bosses after you have unlocked The Core. It can be summoned by placing a Wind Organ of Ice. You can easily locate it with the help of Crydra the Ice Titan Scanner.
Attacks
Crydra has three attacks similar to Druidra in addition to a distinct ice crystal attack:
- Slam down.
- Yellow beam.
- Crydra will charge with ice crystal on the ground, which will continuously shoot two volleys of ice shards in a spiral pattern.
- Roaring shockwave from the sky.
Loot Drops
- Crydra Chest
- Soul of Crydra
- White Hydra Eye
- Ocean Sapphire
- Hydra Bone Shield
- Hydra Bone Breastplate
- Crydra’s Ring
- Solarite Ore
- Ancient Gemstone
- Octarine Ore
- Crydra Figurine
- Hydra Bone Shield
- Hydra Bone Breastplate
- Crydra’s Ring
- Beast Booster
- Fizzy Crystal
- Crystal Sphere
- Arcane Monk Cloak
- Arcane Monk Blindfold
- Arcane Monk Leggings
- Scholar Satchel
- Sun Caller
- Soul Medallion
15. Pyrdra the Fire Titan
Pyrdra is the sixth and final titan boss unlocked after powering up The Core. You can find it within the Desert of the Beginnings. For summoning the boss you have to place a Wind Organ of Fire. It can be easily located by using a Pyrdra the Fire Titan Scanner.
Attacks
Pyrdra spawns with the souls of Druidra and Crydra. The following attacks will be launched by Pyrdra on you:
- If you get too close enough then it will slam down to the ground, dealing damage to you.
- Like Druida and Crydra, Pyrdra will fire a yellow beam from its mouth while tracking you down.
- It will also spit fireballs to the sky in a line, indicating its impact by red markers on the ground. These fireballs will eventually leave Ground Magma Slime on impact.
Loot Drops
- Pyrdra Chest
- Soul of Pyrdra
- Desert Ruby
- Hydra Bone Sword
- Hydra Bone Helm
- Pyrdra’s Necklace
- Solarite Ore
- Ancient Gemstone
- Galaxite Ore
- Pyrdra Figurine
- Hydra Bone Sword
- Hydra Bone Helm
- Pyrdra’s Necklace
- Beast Booster
- Starlight Shards
- Obliteration Ray
- Kingfish Scale
- Arcane Monk Cloak
- Arcane Monk Blindfold
- Arcane Monk Leggings
- Scholar Satchel
- Sun Caller
- Soul Medallion
16. Core Commander
Found within the Desert of Beginnings, the Core Commander is the final story boss of the Core Keeper. To summon this creature you have to interact and shatter the Crystal Meteorite after obtaining all the six titan souls.
Attacks
Core Commander has three different kinds of attacks divided into 2 phases;
Phase 1
- Summons lightning bolts near you, in 4 different pattern
- Summons Circle of lightning bolts
- Summons a total of three groups of lightning bolts
- Summons a single lightning bolt that is relatively faster.
- Summons of numerous purple whirlwinds.
Phase 2
Turning space around it into the void will leave you with only 3 circular safe zones only for safety. Further, on the battlefield, the Core Commander will attack on safe zone. Which will eventually shrink the size of the safe zone leading it to a radius of about only 1 tile.
Loot Drops
- Core Tech
- Void Gun
- Trinity Heart
- Core Commander Helm
- Core Commander Brigandine
- Core Commander Greaves
- Ancient Gemstone
- Beast Booster
- Starlight Shards
- Core Commander Figurine
- Unleashed Core Commander Figurine
- Void Gun
- Trinity Heart
- Core Commander Helm
- Core Commander Brigandine
- Core Commander Greaves
- Jungle Emerald
- Ocean Sapphire
- Desert Ruby
During Seasonal Events the following loot drops also become available:
- Gray Easter Egg (During Easter)
- Samhain Goodie Bag (During Halloween)
- Spookaveling Figurine (During Halloween)
- Spooky Blanket Hood (During Halloween)
- Spooky Blanket Cap (During Halloween)
- Snowball (During Christmas)
- Cookies & Milk (During Christmas)
- Gingerbreadling Figurine (During Christmas)
- Gingerbread Hood (During Christmas)
- Gingerbread Top (During Christmas)
- Gingerbread Pants (During Christmas)
17. Urschleim
Urschleim is an optional end-game boss, which is found within the Passage. In this area, it is found about 1240-1280 tiles from the Core. You will hear a loud sound and your screen will begin to shake confirming the boss’ presence.
Attacks
The creature stretches across the Passage moving slowly towards you, traveling through any obstacles in its path. But are capable of killing you instantly if direct contact is made. Here’s our detailed guide on how to defeat this deadly boss.
Loot Drops
- Urschleim Chest
- Giant Mitochondrion
- Squishy Egg
- Sulfossil Helmet
- Sulfossil Cuirass
- Sulfossil Boots
- Squishy Egg
- Sulfur Bomb
- Cytoplasm
- Calcified Shell
- Sulfossil Helmet
- Sulfossil Cuirass
- Sulfossil Boots
- Urschleim Figurine
- Jungle Emerald
- Desert Ruby
- Ocean Sapphire
