Hakan, Oil-Covered

As long as a creature you control entered the
battlefield this turn or is exerted, it has hexproof.
(An exerted creature won't untap during your next
untap step.)
Whenever Hakan, Oil-Covered attacks, you may
exert it. When you do, it gains +2/+2 until end
of turn.
"I guess victory *slipped* from your grasp, eh?
Wah hah ha ha ha!"