Unstable Ice

ARTICLE

ADVANCED

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Unstable Ice

Frost Invasion • Modern

Similar Article

This article is about Unstable Ice. You may be looking for Unstable Core or other uses of Ice.

Unstable Ice
Mode Appearance	Frost Originally: Operation I.C.E (Easy) Operation I.C.E (Hard)
Wave Debut	19 (Frost) 17 (Operation I.C.E Easy) 20 (Operation I.C.E Hard)
Statistics
Base Health	750 (Frost) 800 (Sandbox)
Speed	Fast (7.25)
Cash Given	$560 on death
Spawned By	Frost Champion
Hidden?	Yes
Flying?	No
Ghost?	No
Lead?	No
Attributes	Bloated (Variable) Aggro (Variable)
Base Health	400 (Easy) 800 (Hard)
Speed	Fast (7.25)
Cash Given	$500 on death (Easy) $1,000 on death (Hard)
Hidden?	No
Flying?	No
Ghost?	No
Lead?	No
Attributes	Freeze Immune
Ability
Ability	Avalanche - After losing all of its health, the Unstable Ice will jump at a nearby tower or unit, exploding upon impact. This applies a 20% Scared Debuff to towers for 5 seconds and deals 50 damage to units. Has a range of 40 and a minimal range of 10.
Ability	Avalanche - After losing all of its health, the Unstable Ice will jump at a nearby tower or unit, exploding upon impact. This freezes any tower or unit caught in a range of 5 for 3 seconds.

Hey, uh... I see something crawling out of the frost.

―Professor V on Wave 19 (Frost)

Description

The Unstable Ice is a Hidden enemy that appears in the Frost mode. Like most of that mode's enemies, it first appeared in the Operation I.C.E Event. It has a decent amount of health and moves at a fast speed. After dying, it will use its Avalanche ability, which makes it jump upon at a tower or unit in its range and explodes, which applies a 20% Scared Debuff to towers for 5 seconds and deals 50 admage to units. If there are no towers or units in range or only towers that cannot be targeted, it dies normally.

Logbook Description

"After a massive avalanche, the sudden compaction of energized snow sparks new life as an Unstable Ice. Lopsided with thick shards protruding from its body, the Unstable Ice can often be found roaming the lower mountain side. The energy from the avalanche is stored within their body and explodes out after death, freezing towers and units."

Appearance

The Unstable Ice is an entity with white skin covered in a thick layer of blue ice. It has one white eye on its head. While it has a large torso and waist, its legs and arms are thin. It has additional layers of snow on its shoulders and torso, which have blue spikes protruding from them. Inside its body, it contains energy from a massive avalanche which is released upon its death.

Strategy

• Towers with decent DPS and hidden detection, like the Golden Scout, Rocketeer, Accelerator, Operator and Golden Soldier can be used to take this down.
• Although it will apply debuffs to towers, it will actually not target any tower with the Stun Immunity, making it either target another tower or if there are no towers without Stun Immunity in its range, it will simply disappear.
  • Do note however that this does not make them immune to the debuff, as they will still receive it if there is a tower next to them without Stun Immunity that gets targeted. This means the only way to benefit from this is having towers with it separated from towers without it, which often is not the optimal way to play.
  • As the Medic gives towers Stun Immunity with its Ubercharge, it can be used to protect them from being targeted by the Unstable Ice.

Gallery

Converted Variants

• 
  Green variant, current version (11 June 2025 – Present)

Corpse Variants

• 
  Second Corpse variant, current version (12 March 2025 – Present)

Thumbnails

• 
  Unstable Ice on the game thumbnail.

Concept Art

• 
  Unstable Ice on concept art.

Miscellaneous

• 
  Unstable Ice on its Index icon.

Trivia

• The Unstable Ice is unaffected by enemy appearance modifiers, such as Talk Like a Pirate Day.

Update History

• 16 December 2024 - v1.46.0
  • Unstable Ice added.
• 15 January 2025 - v1.49.0
  • Unstable Ice removed from the main game, now appears exclusively in Sandbox mode.
• 3 December 2025 - v1.82.0
  • Unstable Ice re-added to the main game, now appears in Frost mode.
    • Has 600 health in Frost mode.
    • Now gives $1,250 on death in Frost mode.
  • Health increased from 100 to 600 in Sandbox mode.
  • Avalanche ability changed.
    • Now stuns towers instead of freezing them.
    • Explosion range increased from 5 to 6.
    • Stun time decreased from 3 to 2.
  • Bug: Explosion visuals no longer appear.
• 28 January 2026 - v1.84.0
  • Health increased from 600 to 800.
  • Cash given decreased from $1,250 to $1,000
  • Avalanche stun time increased from 2 to 3.5.
• 5 June 2026 - v2.0.0
  • Freeze Immunity removed.
  • Bug: Ability no longer works properly with towers either not getting stunned or having delayed effects or for units, them not being frozen at all.
• 28 August 2026 - v2.8.0
  • Health decreased from 800 to 750 in Frost mode.
  • Speed increased from 6.5 to 7.25.
  • Cash given decreased from $1,000 to $560.
  • Now is a Hidden enemy.
  • Avalanche changed.
    • Now applies a 20% Scared Debuff to towers instead of stunning them and deals 50 damage to units instead of freezing them.
    • Explosion range increased from 6 to 8.
    • Minimal range increased from 5 to 10.
  • Size increased.

Frost Mode
Previous Debut	Current Debut	Next Debut
Packed Ice Wave 17	Unstable Ice Wave 19	Frost Invader Wave 20

Outpost 32 (Operation I.C.E Event) (16 December 2024 – 15 January 2025)
Previous Debut	Current Debut	Next Debut
Crying Angel Wave 16 (Easy) Frost Hunter Wave 18 (Hard)	Unstable Ice Wave 17 (Easy) Unstable Ice Wave 20 (Hard)	Frost Mystery Wave 18 (Easy) Crying Angel Wave 21 (Hard)