Mori, Voice of Hunger

0: Each player sacrifices a Being or Creature card, then place a loyalty counter on this card for each card sacrificed this way.
-3: Exile a Being or Creature card from a field, then deal damage to target player equal to the exiled card's cost.
-10: Destroy all other non-Biome cards on every field. Biome cards become colorless and each player mills the top twenty cards of their decks.