Is Halo Forager legal in Standard, Modern, and Commander?

Halo Forager is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Halo Forager

Q: What type of card is Halo Forager?

Halo Forager is a Creature — Faerie Rogue. Its oracle text reads: "Flying When this creature enters, you may pay {X}. When you do, you may cast target instant or sorcery card with mana value X from a graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead. Power/Toughness: 3/1"

Creature — Faerie Rogue

Flying

When this creature enters, you may pay . When you do, you may cast target instant or sorcery card with mana value X from a graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.