Verdiss, Mother of Elves

+1: You may sacrifice a forest. If you do, create a 5/5 green elf warrior creature token. Otherwise create a 1/1 green elf creature token.
-3: Add X green mana to your mana pool, where X is the number of elves you control.
-7: Destroy all artifacts and enchantments. For each permanent destroyed this way, create a 3/3 green elf warrior creature token.