Kira, Fashionista

0: Create a Food token. You may sacrifice a Food token. If you do, put a loyalty counter on Kira.
-3: Kira gains gluttony. (Whenever you would put a counter on a permanent with gluttony, put twice that many counters on it instead.)
-8: Destroy all non-land, non-token permanents. Kira perpetually becomes a 9/20 Elf Glutton creature with lifelink. She's still a planeswalker.