Is Feather, Radiant Arbiter legal in Standard, Modern, and Commander?

Feather, Radiant Arbiter is legal in: Legacy, Vintage, Commander.

Feather, Radiant Arbiter

Q: What type of card is Feather, Radiant Arbiter?

Feather, Radiant Arbiter is a Legendary Creature — Angel. Its oracle text reads: "Flying, lifelink Whenever you cast a noncreature spell that targets only Feather, you may choose any number of other creatures that spell could target and pay {2} for each of those creatures. If you do, for each of those creatures, copy that spell. The copy targets that creature. (Copies of permanent spells become tokens.)"

Legendary Creature — Angel

Flying, lifelink

Whenever you cast a noncreature spell that targets only Feather, you may choose any number of other creatures that spell could target and pay for each of those creatures. If you do, for each of those creatures, copy that spell. The copy targets that creature. (Copies of permanent spells become tokens.)