Is Tasigur, the Golden Fang legal in Standard, Modern, and Commander?

Tasigur, the Golden Fang is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Tasigur, the Golden Fang

Q: What type of card is Tasigur, the Golden Fang?

Tasigur, the Golden Fang is a Legendary Creature — Human Shaman. Its oracle text reads: "Delve (Each card you exile from your graveyard while casting this spell pays for {1}.){2}{G/U}{G/U}: Mill two cards, then return a nonland card of an opponent's choice from your graveyard to your hand."

Legendary Creature — Human Shaman

Delve (Each card you exile from your graveyard while casting this spell pays for .)<br>: Mill two cards, then return a nonland card of an opponent's choice from your graveyard to your hand.