Rorri, the Ocean Devourer

Trample, Islandwalk
when Rorri, the Ocean Devourer enters the battlefield, draw a card for each creature you
control.
{g/u}{g/u}{g/u}{g/u}{t}, cast a card with x in its mana
cost without paying its mana cost, x equals 12.
{g/u}{g/u}Sacrifice a creature; draw x cards where
x is the sacrificed creatures power
{g/u}Sacrifice an island; put any number of land
cards from your hand onto the battlefield