Is Claws Out legal in Standard, Modern, and Commander?

Claws Out is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Claws Out

Q: What type of card is Claws Out?

Claws Out is an Instant. Its oracle text reads: "Affinity for Cats (This spell costs {1} less to cast for each Cat you control.) Creatures you control get +2/+2 until end of turn. *"I'm sure we can spare a little of today's catch for a hungry friend. Or two. Or five. Or . . . seven . . ." —Lars, fisherman*"