Leviathan, King Of The Sea

Islandwalk, Hexproof, Leviathan can't be countered, Deathtouch, Menace.
When Leviathan enters the battlefield destroy all other creatures in play and create X 5/5 Kraken creature tokens with islandwalk onto the battlefield where X is the number of creatures destroyed. Whenever Leviathan destroys a permanent, create a 5/5 Kraken creature token with Islandwalk onto the battlefield.