Viral Frost

Viral Frost is the final upgrade of path 1 for the Ice Tower in Bloons Tower Defense 5.

Whenever Bloons touch frozen Bloons, they also get frozen, and so on, spreading it like a virus. The viral freezing effect also affects White Bloons and Zebra Bloons. The main use of this upgrade is to pass the freezing effect on through lines of bloons out of the tower's range and onto camo bloons. It costs $5100 on Easy, $6000 on Medium and $6480 on Hard. Viral frost does not apply Snap freeze.