Is Coalition Skyknight legal in Standard, Modern, and Commander?

Coalition Skyknight is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Coalition Skyknight

Q: What type of card is Coalition Skyknight?

Coalition Skyknight is a Creature — Human Knight. Its oracle text reads: "Flying 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.)"

Creature — Human Knight

Flying

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.)

Set Dominaria United

Rarity Uncommon

Mana Value 4

Artist Aaron Miller

Collector # 14

Scryfall Gatherer