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Metal Freeze is the second upgrade of Path 1 for the Ice Monkey in BTD6. It allows Leads to become frozen and popped by the Ice Monkey. This upgrade inherits Permafrost effects from the previous upgrade of the same name. It costs $255 on Easy, $300 in Medium, $325 on Hard, and $360 on Impoppable.
- A 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).