The Ice Tower freezes bloons in it's range. Can't freeze MOAB class bloons, white or zebra bloons. Costs 450.
Ice Tower Plus: Attacks quicker and has longer range! 300
Snap Freeze: Bloons pop once when frozen! 400
Arctic Wind: Any bloons nearby are slowed, and the freeze effect is huge. 1850.
Viral Frost: Any bloons touching frozen bloons are frozen, even white or zebra bloons! 4500
Permafrost: Bloons are slowed even after freezing! 100
Deep Freeze: Affects 2 layers. 300
Piercing Freeze: Affects 5 layers. 1500
Hyper Freeze: Affects all layers, and can affect MOABs. 12500
Brittleness: Frozen bloons pop again after they are thawed by a weapon! 450
Ice Trail: Bloons are frozen for longer. 350
Ice Shards: When thawed, bloons shoot 8 shards that pop nearby bloons. 2000
Absolute 0: Bloons are frozen for ages, and lose 3 layers when thawed! 9000