Delana Lex, The Pacifier

First Strike, Arrest 1 (Whenever this creature deals
damage to a creature, put an arrest counter on that creature and remove it from combat. For as long as it
has arrest counters on it, it can't attack or block and
has "At the beginning of your upkeep,remove an arrest
counter from this creature.")
{3}{w}{w};Discard a card:Exile target creature with
an arrest counter on it. Activate this ability only
during your turn.