Is The Last Agni Kai legal in Standard, Modern, and Commander?

The Last Agni Kai is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

The Last Agni Kai

Q: What type of card is The Last Agni Kai?

The Last Agni Kai is an Instant. Its oracle text reads: "Target creature you control fights target creature an opponent controls. If the creature the opponent controls is dealt excess damage this way, add that much {R}. Until end of turn, you don't lose unspent red mana as steps and phases end."

Instant

$1.96 ↗20 similarCommander, Modern

Target creature you control fights target creature an opponent controls. If the creature the opponent controls is dealt excess damage this way, add that much .

Until end of turn, you don't lose unspent red mana as steps and phases end.

Set Avatar: The Last Airbender

Rarity Rare

Mana Value 2

Artist Pablo Rivera

Collector # 144