Restless Reef from The Lost Caverns of Ixalan (349) is a Rare Land card.
Illustrator: Thomas Stoop
Rules
This land enters tapped.
{T}: Add {U} or {B}.
{2}{U}{B}: Until end of turn, this land becomes a 4/4 blue and black Shark creature with deathtouch. It's still a land.
Whenever this land attacks, target player mills four cards.
