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: Target unblocked attacking creature becomes blocked. Activate only during combat after blockers are declared. (This ability works on creatures that can't be blocked.)
If the ability is used on a creature with Trample, the damage still comes through.
This ability will trigger any creature’s “whenever this becomes blocked” ability.
If a turn has multiple combat phases, the ability can be activated during any of them as long as it’s after the beginning of that phase’s Declare Blockers Step.