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Woolly Razorback enters the battlefield with three ice counters on it.
As long as Woolly Razorback has an ice counter on it, prevent all combat damage it would deal and it has defender.
Whenever Woolly Razorback blocks, remove an ice counter from it.
Having an ice counter on Woolly Razorback doesn’t prevent combat damage that would be dealt to it.
The third time Woolly Razorback blocks, its last ice counter will be removed, meaning the combat damage it deals that combat won’t be prevented.
