Tláloc, God of Rain

Convoke, reach, lifelink, indestructible
Divine Favour (You may exile the top six cards of
your library rather than pay this spell's mana cost.)
Rising tides — When Tlaloc, God of Rain enters
the battlefield, add {u}{u} to your mana pool.
{2}{u}, {t}: Turn all opponents' lands into islands.
You gain 1 life for every island.