Is Killer Service legal in Standard, Modern, and Commander?

Killer Service is legal in: Legacy, Vintage, Commander.

What type of card is Killer Service?

Killer Service is an Enchantment. Its oracle text reads: "When this enchantment enters, create a number of Food tokens equal to the number of opponents you have. (They're artifacts with "{2}, {T}, 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."

Killer Service

Enchantment

When this enchantment enters, create a number of Food tokens equal to the number of opponents you have. (They're artifacts with ", , Sacrifice this token: You gain 3 life.")