Ratapu, Leviathan of the Abyss

Menace, Trample

Abyssal Surge -When Ratapu, Leviathan of the
Abyss enters the battlefield, return all non-blue creatures your opponents control to their hand.
Ocean's Wrath -Whenever Ratapu deals combat
damage to a player, you may have that player mill
ten cards.

"From the darkest depths, Ratapu rises, a harbinger
of the ocean's fury."