Emperor Palpatine

All other non Sith creatures you control get
+1/+1. When Emperor Palpatine leaves the
battlefield, create an emblem with "Creatures
you control get -1/-1."
{1}{u}{u}, {t}: Exile cards from the top of target
players library until you reveal an instant or
sorcery card. Utile the end of the turn, you may
play that card without paying its mana cost.