Children of Blood

Explore {x} - Reveal the top {x} cards from your library. If the revealed cards are a land, put that card or cards in your hand. If it's not a land card, put {x} +1/+1 counters on Children of Blood. Then you decide if the nonland cards go back on top of the library or in your graveyard.
Enrage - Whenever Children of Blood is dealt damage, put an +1/+1 counter on this creature.