The Frozen Horror

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The Frozen Horror
Type Dungeon Boss
Location Frozen Owl Monastery
Level (Tier) 20 (10)
HP 63,000
XP 12,800
Element Ice
Misc Notes
+100% Damage from Poison
-50% Damage from Ice
Immune to Confuse Effect
+25% Camera View within 24 units

Portrait Horror.png

"Eternal ice. I must keep the samples safe."

The Frozen Horror is a Tier 10 Dungeon Boss found within the Frozen Owl Monastery.


The Frozen Horror will periodically cycle through several phases. It will become invulnerable for a period of time when its health reaches a certain threshold. Throughout the fight, the Frozen Horror spawns Frost Serpent Hatchling minions. Their spawn rate increases as its health gets lower, with 2 minions spawning at 75% HP, 3 at 50% HP, and 4 at 10% HP.

Blizzard Phase A

The Frozen Horror will summon a blizzard which affects the entire boss room, slowing all players within its vicinity. It also starts firing a rotating stream of small, moderately damaging ice bullets in three directions.

Blizzard Phase B

The Frozen Horror summons a blizzard and fires a scattered volley of small, moderately damaging ice bullets.

Fountains Phase

The Frozen Horror spawns 5 Ice Fountains which travel outwards from itself. At the same time, the boss shoots large, highly damaging, stationary slowing projectiles which 'branch' out in all directions. If the Ice Fountains are not destroyed, they begin shooting smaller versions of the Frozen Horror's ice projectiles which also branch out. The boss will remain invulnerable until all Ice Fountains are destroyed. At 50% HP, the boss will begin firing crisscrossing lasers in addition to its other attacks.

Snowflake Phase

The Frozen Horror summons many bullets in a formation of six, small, stationary slowing shots. They radiate out from the Frozen Horror and curl backwards in a hook-shaped pattern. Their spawn location is indicated by a pulsing red circle. This phase can be skipped if the boss is rapidly damaged to its next HP threshold.

Final Phase

At 10% HP, the Frozen Horror will use all of its aforementioned abilities in rapid succession.


  • Frost Serpent Hatchling
  • Frozen Horror Ice Fountain


Warning icon.png Notes on Drops: Warning icon.png
  • Percentages aren't always exact. Some are based on patterns. Some are even just estimates.
  • Values shown are "chance for this item to drop on any given kill" with one exception:
    • Where "one of many" can drop (e.g. T10s, ELEM weapons), they all show the total chance that any of them will drop.
Drop Table
Name Drop Count Type Drop Chance
Nucleation-Active Protein.png
Nucleation-Active Protein
2 Upgrade 100%
Barrel Dopant.png
Barrel Dopant
1 Upgrade ?
Tier 8 Equipment 1 Tiered Equipment ?
Tier 9 Equipment 1 Tiered Equipment 5%
Ice Elemental Weapons 1 Elemental Equipment ?
Machine Gun.png
Piercing Frost
1 Special Equipment 0.33%
Frozen Gem 1 Gem 1%
Light Crystal 3 Ingredient 100%


  • The Frozen Horror's ice attacks can inflict slow, which can result in it chain slowing you and tanking the rest of his volley. This is especially dangerous in Blizzard Phase A.
  • The branching ice attack from the Frozen Horror can do extremely high damage if you get caught in it. Back out if you have to, and wait for them to despawn.
  • The "snowflakes" spawned by The Frozen Horror can rapidly drain your hp. Use extreme caution.