Is Burning Shield Askari legal in Standard, Modern, and Commander?

Burning Shield Askari is legal in: Legacy, Vintage, Commander, Pauper.

Burning Shield Askari

Q: What type of card is Burning Shield Askari?

Burning Shield Askari is a Creature — Human Knight. Its oracle text reads: "Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.){R}{R}: Burning Shield Askari gains first strike until end of turn."

Creature — Human Knight

Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)<br>: Burning Shield Askari gains first strike until end of turn.

Set Mirage

Rarity Common

Artist Dan Frazier