Lavinia, Azorius Arrester

+1: You may reveal a permanent with an activated ability from your hand. You may activate that ability from your hand until end of turn.
-1: Detain target permanent until your next turn. You may activate this ability any number of times during your turn.
-4: You get an emblem, "Whenever you deal damage to a creature you don't control, detain that creature until your next turn."