Is Vihaan, Goldwaker legal in Standard, Modern, and Commander?

Vihaan, Goldwaker is legal in: Legacy, Vintage, Commander.

Vihaan, Goldwaker

Q: What type of card is Vihaan, Goldwaker?

Vihaan, Goldwaker is a Legendary Creature — Dwarf Warlock. Its oracle text reads: "Other outlaws you control have vigilance and haste. (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.) At the beginning of combat on your turn, you may have Treasures you control become 3/3 Construct Assassin artifact creatures in addition to their other types until end of turn. Power/Toughness: 3/3"

Legendary Creature — Dwarf Warlock

Other outlaws you control have vigilance and haste. (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.)

At the beginning of combat on your turn, you may have Treasures you control become 3/3 Construct Assassin artifact creatures in addition to their other types until end of turn.

Power/Toughness: 3/3

Set Outlaws of Thunder Junction Commander

Rarity Mythic Rare

Mana Value 3

Artist Magali Villeneuve

Collector # 8

Scryfall