Vader, Darth Lord of the Sith

First Strike, Trample

When Vader deals combat damage to an opponent, put a +1+1 counter on it, and all creatures with power equal to or less than the number of counters on Vader cannot attack next combat.

{x}: Vader deals X damage to target creature. This ability can only be activated once each turn. This ability costs X less to cast where X is the number of counters on Vader.