Is Reckless Imp legal in Standard, Modern, and Commander?

Reckless Imp is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper.

Reckless Imp

Q: What type of card is Reckless Imp?

Reckless Imp is a Creature — Imp. Its oracle text reads: "Flying This creature can't block. Dash {1}{B} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)"

Creature — Imp

Flying

This creature can't block.

Dash (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)