Gomalu, Supreme Leviathan

As an additional cost to cast Gomalu, Supreme Leviathan, Exile all non-blue, non-land permanents you control
Trample
When Gomalu, Supreme Leviathan deals combat damage to a player, tap that many permanents that player controls
At the beginning of your upkeep, sacrifice a island, Pay {2}{u}, or sacrifice Gomalu, Supreme Leviathan