Erakmin, Maelstrom of Death

Trample
Whenever Erakmin, Maelstrom of Death attacks, you may exile a creature card from
your graveyard. If you do, create a 5/5 green Leviathan creature token with trample that
is tapped and attacking.
{b}{g}: Put the top three cards of your library into your graveyard, then draw a card.