Is Argivian Cavalier legal in Standard, Modern, and Commander?

Argivian Cavalier is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Argivian Cavalier

Q: What type of card is Argivian Cavalier?

Argivian Cavalier is a Creature — Orc Knight. Its oracle text reads: "Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.) When this creature enters, create a 1/1 white Soldier creature token."

Creature — Orc Knight

Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.)

When this creature enters, create a 1/1 white Soldier creature token.

Set Dominaria United

Rarity Common

Mana Value 3

Artist Chris Seaman

Collector # 4

Scryfall Gatherer