Is Niall Silvain legal in Standard, Modern, and Commander?

Niall Silvain is legal in: Legacy, Vintage, Commander.

What type of card is Niall Silvain?

Niall Silvain is a Creature — Ouphe. Its oracle text reads: "{G}{G}{G}{G}, {T}: Regenerate target creature."

Creature — Ouphe

, : Regenerate target creature.

Set The Dark

Rarity Rare

Artist Christopher Rush

Creature Commander Legacy Vintage