Is Flamerush Rider legal in Standard, Modern, and Commander?

Flamerush Rider is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Flamerush Rider

Q: What type of card is Flamerush Rider?

Flamerush Rider is a Creature — Human Warrior. Its oracle text reads: "Whenever this creature attacks, create a token that's a copy of another target attacking creature and that's tapped and attacking. Exile the token at end of combat. Dash {2}{R}{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 — Human Warrior

Whenever this creature attacks, create a token that's a copy of another target attacking creature and that's tapped and attacking. Exile the token at end of combat.

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.)