Is Mardu Scout legal in Standard, Modern, and Commander?

Mardu Scout is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper.

Mardu Scout

Q: What type of card is Mardu Scout?

Mardu Scout is a Creature — Goblin Scout. Its oracle text reads: "Dash {1}{R} (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 — Goblin Scout

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.)