Killer Service (MKC-174) - Murders at Karlov Manor Commander

When this enchantment enters, create a number of Food tokens equal to the number of opponents you have. (They're artifacts with "{2}, , Sacrifice this token: You gain 3 life.")
At the beginning of your end step, you may pay {2} and sacrifice a token. If you do, create a 4/4 green Rhino Warrior creature token.