Merfolk Isle

{t}: Add {u}.
As Merfolk Isle enters the battlefield, you may
reveal a Merfolk card from your hand. If you do
not, Merfolk Isle enters the battlefield tapped.
{t}: Add {g} or {w}. Merfolk Isle deals 1 damage
to you.
{g/w}{u}: Until end of turn, Merfolk Isle becomes
a 2/2 Merfolk creature. It is still a land.