Is Rainbow Efreet legal in Standard, Modern, and Commander?

Rainbow Efreet is legal in: Legacy, Vintage, Commander.

Rainbow Efreet

Q: What type of card is Rainbow Efreet?

Rainbow Efreet is a Creature — Efreet. Its oracle text reads: "Flying{U}{U}: Rainbow Efreet phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before you untap during your next untap step.)"

Creature — Efreet

Flying<br>: Rainbow Efreet phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before you untap during your next untap step.)

Set Visions

Rarity Rare

Artist Nathalie Hertz