Sky, World Traveler

When Sky comes into play, if she was cast, untap up to X target nonbasic lands that
have a basic land type, where X is the amount
of mana spent to cast Sky.

When Sky deals combat damage to a player,
if you control ten or more nonbasic lands that each have a basic land type, that player loses the game.

"It's over now, isn't it? Funny how we get attached to the struggle." - Madeline Thorson