Is Drift of Phantasms legal in Standard, Modern, and Commander?

Drift of Phantasms is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Drift of Phantasms?

Drift of Phantasms is a Creature — Spirit. Its oracle text reads: "Defender (This creature can't attack.) Flying Transmute {1}{U}{U} ({1}{U}{U}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)"

Drift of Phantasms

Creature — Spirit

Defender (This creature can't attack.)

Flying

Transmute (, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)