Vircone, Hive Escapee

+2: Vircone becomes a 1/1 Sliver creature until end of turn. Prevent all damage that would be dealt to him this turn. He's still a planeswalker.
-X: Up to X target Traitor creatures that aren't Elementals get +1/+1 until end of turn. If they're Slivers, they get +2/+2 instead.
-7: Exile all non-Traitor, non-Elemental, non-Sliver creatures. Search your library for a card and put it into your hand.