Frost Mystery

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Frost Mystery

Frost Invasion • Modern

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This article is about Frost Mystery. You may be looking for other uses of Frost or other Mystery enemies.

"(No way!?) Is that a Frost Mystery?! It's been years since we've seen one! You just (not said in audio) HAVE to bring one back for me!"
File:FrostWave9-1.ogg

―Professor V on Wave 12 (Frost)

Description

The Frost Mystery is a summoner 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 low amount of health and fast speed. When killed, it will summon one random Bloated enemy. During the event, this was five enemies instead.

Logbook Description

"The Frost Mystery is considered one of the most terrifying creatures in the Frost Realm. It has an exoskeleton made of tough solid ice, while its insides contain water that cannot be frozen. According to legend, these beings are created from those who fall through frozen lakes and never resurface. The shadowy figure visible within is believed to be one of these unfortunate souls. It releases frost enemies with modifiers upon death."

Enemies Spawned

In Frost mode, the Frost Mystery summons in one enemy from a set list. These enemies are:

• Snowman (31.58% chance, 0.4 delay)
• Frostmite (26.32% chance, 0.5 delay)
• Cold Mist (26.32% chance, 0.7 delay)
• Snow Minion (15.79% chance, 0.7 delay)

During the Operation I.C.E Event, the Frost Mystery summoned five random enemies from a set list, all with their own chances of being chosen. Additionally, all of them had random attributes applied to them, which also had their own odds of being chosen. It could summon the following enemies:

• Snowy (30% chance, 0.1 delay)
• Frozen (30% chance, 0.1 delay)
• Snow Minion (30% chance, 0.1 delay)
• Packed Ice (10% chance, 0.1 delay)

These could spawn with the following attributes:

• Nimble (35% chance)
• Bloated (35% chance)
• Health Regen (15% chance)
• Aggro (15% chance)

Strategy

• Early-game towers like the Golden Scout, Golden Soldier, Cowboy or Operator can be useful against it.
  • As these spawn in hordes, AOE towers like the Rocketeer, Electroshocker or Archer can also be pretty effective.

Gallery

Previous Variants

• 
  First version (16 December 2024 – 3 December 2025)

Animations

• 
  First stun animation (16 December 2024 – 3 December 2025)

Converted Variants

• 
  Green variant, first version variant (11 June 2025 – 3 December 2025)

Corpse Variants

• 
  Second Corpse variant, first version variant (12 March 2025 – 3 December 2025)
• 
  Second Corpse variant, second version variant (3 December 2025 – Present)

Promotional Videos

• Frost Mystery on a promotional video.
  Frost Mystery on a promotional video.

Miscellaneous

• 
  Frost Mystery on its Index icon.

Trivia

• The description in the Index for the Frost Mystery mentions that it is created when people fall through frozen lakes and never resurface. This is a reference to the original Outpost 32 map from the Frost Invasion Event, which had a lake which players could fall through.
• The Frost Mystery is unaffected by enemy appearance modifiers, such as Talk Like a Pirate Day.

Update History

• 16 December 2024 - v1.46.0
  • Frost Mystery added.
• 15 January 2025 - v1.49.0
  • Frost Mystery removed from the main game, now appears exclusively in Sandbox mode.
• 3 December 2025 - v1.82.0
  • Frost Mystery re-added to the main game, now appears in Frost mode.
    • Has 40 health in Frost mode.
    • Now gives $300 on death in Frost mode.
    • Speed increased from Above Average (3.5) to Slightly Fast (5.4).
  • Appearance changed.
  • Health decreased from 50 to 40 health in Sandbox mode.
  • Icebreaker ability changed.
    • Number of enemies spawned decreased from 5 to 1.
    • Now summons Snowman and Frostmite.
    • No longer summons Snowy, Frozen or Snow Minion.
    • Packed Ice chance increased from 10% to 33%.
  • Bug: Frost Mystery still uses its first model in the Index.
• 28 January 2026 - v1.84.0
  • Health increased from 40 to 50.
• 28 August 2026 - v2.8.0
  • Health increased from 50 to 100 in Frost mode.
  • Health increased from 50 to 100 in Sandbox mode.
  • Icebreaker ability changed.
    • Now summons the Snow Minion with a 15.79% chance and 0.7 delay, and Cold Mist with a 26.32% chance and 0.7 delay.
    • No longer summons the Packed Ice.
    • Snowman chance decreased from 34% to 31.58%.
    • Snowman delay increased from 0.1 to 0.4.
    • Frostmite chance decreased from 33% to 26.32%.
    • Frostmite delay increased from 0.1 to 0.5.
    • Summoned enemies are no longer Bloated.

Frost Mode
Previous Debut	Current Debut	Next Debut
Cold Mist Wave 10	Frost Mystery Wave 12	Crying Angel Wave 14

Outpost 32 (Operation I.C.E Event) (16 December 2024 – 15 January 2025)
Previous Debut	Current Debut	Next Debut
Unstable Ice Wave 17 (Easy) Crying Angel Wave 21 (Hard)	Frost Mystery Wave 18 (Easy) Frost Mystery Wave 23 (Hard)	Frost Invader Wave 20 (Hard) Frost Invader Wave 26 (Hard)