Arguel, Blood Seeker

When Arguel, Blood Seeker enters the battlefield, you may sacrifice another creature. If you do, explore a number of
times equal to the converted mana cost of
the sacrificed creature. (Reveal the top card of
your library. Put that card into your hand if it's
a land. Otherwise, put a +1/+1 counter on this creature, then put the card back on top or into
your graveyard.)