Ulmo, Dweller of the Deep

As long as you control less than five Islands,
Ulmo isn't a creature.
{1}{u}{u}: Search you library for an Island card and reveal it. Shuffle your library, then put the card
on top of it.
At the beginning of your upkeep, look at the top
card of your library. If it's a land card, you may
reveal it and create a 2/1 blue Sea Serpent
creature token.