Seaswallow Greatmaw

Devour 6 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with that many +6/+6 counters on it.)
Destroy all Islands
"A Greatmaw's immense mouth allows is to effortlessly catch anything. Its body can expand to enormous proportions to accommodate whales, krakens, leviathans, and islands." -- Kalin, Oceanic Researcher