Maritis, Trenchborn Queen

Obscurity —As long as Maritis, Trenchborn
Queen is in the graveyard or on the battlefield,
nonbasic lands you control have "{t}: Add one
mana of any color."
At the beginning of combat on your turn, you
may put an awakening counter on target land
you control. It becomes a 6/6 blue Leviathan
creature for as long as it has an awakening
counter on it. It's still a land.