Kessig is a common Plane — Innistrad card from Planechase Anthology Planes (OPCA), collector number 42. Current market price: $2.07, TCGplayer market prices via Scryfall.
Prevent all combat damage that would be dealt by non-Werewolf creatures. Whenever chaos ensues, each creature you control gets +2/+2, gains trample, and becomes a Werewolf in addition to its other types until end of turn.