Permafrost



"Slows Bloons down even after they thaw out!"

- BTD 5 description

Permafrost is the second upgrade of the Ice Tower.

This is the second upgrade of the Ice Tower. It allows Bloons to stay slow once they have been unfrozen.They can be upgraded into Snap Freeze.

In BTD5, its the 1st upgrade of the second path.

BTD3 Costs

 * Easy : $215


 * Medium: $255


 * Hard: $270

BTD4 Costs

 * Easy : $85


 * Medium: $100


 * Hard: $115

BTD5 Costs

 * Easy : $85


 * Medium: $100


 * Hard: $115