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For the damage type granted by this upgrade, see Metal Freeze (damage type).
Can freeze and pop Lead and Camo Bloons.
~ In-game description

Cold Snap (formerly known as Metal Freeze) is the second upgrade of Path 1 for the Ice Monkey in Bloons TD 6. It grants the Ice Monkey camo detection and allows it to freeze and pop Lead and Camo bloons. This upgrade inherits the effects of Permafrost. If crosspathed with Cryo Cannon and above, the Ice Monkey gains Camo Prioritization.

This upgrade costs $295 on Easy, $350 on Medium, $380 on Hard, and $420 on Impoppable.



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Cold Snap

This upgrade replaces the blue snowflake symbol on top of the monkey's head with a dark grey headband with a grey hexagonal piece on the front. The piece is engraved with a light grey snowflake symbol.

In addition to Permafrost upgrade's benefits, gains camo detection and lead-popping power. Also gives Camo Prioritization to Cryo Cannon and above.

Targeting Priorities[]

Cold Snap produces freezing blasts in a zone-like style. Technically, the Ice Monkey is locked on the Close targeting priority. However, for simplicity reasons, this monkey has no targeting priorities.

Full Popology[]


Updated as of Version 37.3
Base stats
  • Freeze:
    • Zone, metal freeze type (pops all except Frozen and White), detects centerpoint hitbox, 20 range, 2.4s attack cooldown, 1 damage, 40 pierce, freezes for 1.5s. Blast radius matches current range. Can detect camo. Applies Permafrost status effect, slowing down affected bloons by 50%.
Crosspathing interactions
  • 2-2-0: Permafrost penetrates two layers. Pierce increased from 40 to 45.
  • 2-0-2: Damage type changed from metal freeze (pops all except Frozen and White) to metal glacier freeze (pops all except White).
  • 2-3-0: Aura can affect Leads and Camos.
  • 2-4-0: Applies Permafrost to non-blimp bloons affected by ability, including Leads. Permafrost penetrates two layers.
  • 2-5-0: Applies Permafrost to all bloons affected by ability or main attack, including Leads and DDTs. Permafrost penetrates four layers.
  • 2-0-3: Also gains Camo Priority as a targeting option.
  • 2-0-5: Applies Permafrost to all bloons affected by snowballs, including Leads and DDTs.
  • Tier 3+ with 2-x-x: Can apply freeze effect on Ceramics for 100% duration instead of 50%.
Monkey Knowledge interactions

Attack Interactions[]

See also: Attack Interactions/Bloons TD 6/Primary
Updated as of Version 37.3
Base attack(s)
  • Freeze:
    • Metal Freeze Type (pops Black, Purple, Lead) Metal Freeze
    • Also affects Camo Bloons Camo Detection
    • Area of Effect Area of Effect
    • Target Bloon(s) (unless upgraded to tier 5) Target Bloon
    • Freeze (standard bloons, 1 Freeze (1.5s duration, 0.75s Ceramic duration)
    • Permafrost (unspecified detail of slowdown) Permafrost (permanent slowdown)
      • Slowdown (50% permanent slowdown for all affected bloons, soaks 1 layer) Slowdown (50%, permanent)


Updated as of Version 43.0. Listed prices exclude external buffs, any sacrifices, and Monkey Knowledge.
[Module | Data] Purchase Sell
Costs Easy Medium Hard Impoppable Easy Medium Hard Impoppable
Upgrade (2-X-X) $295 $350 $380 $420 -
Total (2-0-0) $845 $1,000 $1,080 $1,200 $592 $700 $756 $840
Crosspath (2-1-0) $1,035 $1,225 $1,325 $1,470 $725 $858 $928 $1,029
Crosspath (2-2-0) $1,415 $1,675 $1,810 $2,010 $991 $1,173 $1,267 $1,407
Crosspath (2-0-1) $995 $1,175 $1,270 $1,410 $697 $823 $889 $987
Crosspath (2-0-2) $1,185 $1,400 $1,515 $1,680 $830 $980 $1,061 $1,176

This upgrade's prices (or included crosspath's prices) are affected by the following MK: BetterSellDealsIcon Better Sell Deals



Cold Snap comes with both early lead-popping power and early camo-popping power. While the lead-popping is not as reliable as alternate options, it does come with the Permafrost effect for further slowing down bloons. In addition, the camo detection allows for direct camo-popping of Ice Monkeys.

As for higher-tier upgrades, this upgrade is generally reserved for Icicle Impale to damage DDTs in the absence any external buffs, mainly Monkey Intelligence Bureau or Acidic Mixture Dip spam.


  • It is not very reliable at popping Lead Bloons, but it is never a bad option for countering Lead Bloons, as its Permafrost effects can come in handy for certain occasions, especially versus incoming Ceramics.
  • Cold Snap is generally used with Icicle Impale sometimes when direct DDT-popping power is required.
  • Adding this with Cryo Cannon allows a 2-0-3 Cryo Cannon to deal Round 63 quite effectively by popping the Leads and slowing the Ceramics. The same 2-0-3 Cryo Cannon can also be used to excel against Golden Bloons.
  • Because of the Version 25.0 reworks, Cold Snap is required for Snowstorm ability to freeze Leads and DDTs, unless given Acidic Mixture Dip or has Monkey Intelligence Bureau in radius. Likewise occurs for Icicle Impale.
  • Cold Snap can be used in a similar manner to a Permafrost Ice against Camo Ceramic rounds such as Round 78, slowing them down and separating the clumps.

Version History[]

Balance Changes[]

Most buffs to Metal Freeze/Cold Snap are simply inherited from Permafrost. It was not significantly affected by specialized balance changes until 28.0, where it received built-in camo detection in exchange for a small price nerf.

  • BUFF Affected by base Ice pierce buff
  • BUFF [Undocumented] Icicles' spikes with Metal Freeze now pops Leads
Embrittlement being a 'camo reveal' has not been viable due to the price, so T2 Metal Freeze has been granted camo detection to allow this tower to somewhat hold off camos while it saves up to become a reveal. [...]
~ Ninja Kiwi
  • Change Upgrade name changed from "Metal Freeze" to "Cold Snap".
  • BUFF Cold Snap now has Camo Detection.
  • NERF Cold Snap price increased ($300 → $350)
  • NERF Affected by base Ice pierce nerf
  • BUFF Cold Snap now grants Cryo Cannon with the Camo Prioritization targeting option
  • NERF Tier 2 and below Ice Monkeys only apply 50% freeze effect to Ceramics
We’re happier with more recent freeze changes succeeding in some of the intentions of older nerfs, given the base tower value in races being hit far more than intended we’re going back over the pierce for Ice Monkey base & middle crosspath. [...]
~ Ninja Kiwi
  • BUFF Affected by base Ice pierce buff

Bug Fixes and General Changes[]

  • Change Description changed from "Can freeze and pop Lead Bloons." to "Can freeze and pop Lead and Camo Bloons."

Extra Notes (Version History)[]


Official artwork[]


  • Prior to Version 28.0 which reworked Metal Freeze / Cold Snap into a camo-detecting tower, 2-0-0 Ice Monkey in BTD6 is basically equal to a 2-1 Ice Tower in BTD5 except without Enhanced Freeze (equivalent to Enhanced Freeze and Larger Radius in BTD6).
  • Cold Snap could be a reference to the pre-BTD6 upgrade Snap Freeze, which is fitting because the Cold Snap's upgrade icon depicts a snapped bloon inflicted by cold.