Tatsuya, the Burning Tide

Hideaway (This creature enters the battlefield tapped.
When it does, look at the top four cards of your library,
exile one face down, then put the rest on the bottom of
your library.)
Whenever Tatsuya, the Burning Tide deals
combat damage to a player, reveal the exiled
card. Tatsuya deals damage to that player equal
to the revealed card's converted mana cost. Put
that card into your hand. Exile Tatsuya, then
return it to the battlefield.