Merizon, predator of the deep

Shroud, menace, islandwalk, haste
When Merizon, predator of the deep enters the battlefield, search your library for {x} number of Krakens, Leviathans, and Dinosaurs and put them
onto the battlefield where {x} is the number of Islands, Swamps, and Forests you control. They
gain haste until the end of the turn.
When Merizon, predator of the deep, attacks, you
may have up to two creatures you control fight up
to two creatures you don't control. Then sacrifice
two creatures, and draw two cards.