Moglid, Maw of the Seas

Sacrifice an island you control: Moglid, Maw
of the Seas can't be blocked this turn.
Whenever Moglid deals combat damage to a
player, return a creature that player controls
to its owner's hand with toughness X or less
where X is the number of islands you control.
And in its mouth went the first three seas
and a plentiful amount of boats.