Yulith, Forest Burner

+3: Return a land you control to its owner's hand. If the land is a mountain, deal 2 damage to target player.
-2: Create a 1/1 colorless artifact creature token with flying and "Whenever this creature attacks, it deals 1 damage to any target.
-12: Target player loses 2 life for each forest they control, then destroy all lands they control.