Mathael, Reaper of Souls

{t} : Deals 2 damage to all creatures each opponent control. If a creature dies this way, put
X +1/+1 counters on Mathael, Reaper of Souls, where X is that creature's converted mana cost.
Double strike, Flying, Hexproof.
Whenever Mathael, Reaper of Souls deals combat damage to a player, that play reveals his or her hand, you choose up to 2 nonland cards from it and exile it.