Is Neriv, Crackling Vanguard legal in Standard, Modern, and Commander?

Neriv, Crackling Vanguard is legal in: Legacy, Vintage, Commander, Historic.

Neriv, Crackling Vanguard

Q: What type of card is Neriv, Crackling Vanguard?

Neriv, Crackling Vanguard is a Legendary Creature — Spirit Dragon. Its oracle text reads: "Flying, deathtouch When Neriv enters, create two 1/1 red Goblin creature tokens. Whenever Neriv attacks, exile a number of cards from the top of your library equal to the number of differently named tokens you control. During any turn you attacked with a commander, you may play those cards."

Legendary Creature — Spirit Dragon

Flying, deathtouch

When Neriv enters, create two 1/1 red Goblin creature tokens.

Whenever Neriv attacks, exile a number of cards from the top of your library equal to the number of differently named tokens you control. During any turn you attacked with a commander, you may play those cards.

Set Tarkir: Dragonstorm Commander

Rarity Mythic Rare

Mana Value 5

Artist Lucas Graciano

Collector # 6

Scryfall Gatherer