Vastuum

+2 Until you next turn creatures opponents control gain “This can’t attack or block unless you pay 4.”
+1 Each opponent exiles a card from his or her hand, a nonland permanent he or she controls and the top card of his or her library.
-4 Target opponent gets an emblem with “Spells you cast cost 2 more to cast.”
-12 Put any number of permanent cards from your hand, graveyard or exiled with Karn onto the battlefield under your control.