Is Rodolf Duskbringer legal in Standard, Modern, and Commander?

Rodolf Duskbringer is legal in: Legacy, Vintage, Commander, Historic.

Rodolf Duskbringer

Q: What type of card is Rodolf Duskbringer?

Rodolf Duskbringer is a Legendary Creature — Vampire Angel. Its oracle text reads: "Flying, deathtouch, lifelink Whenever you gain life, Rodolf Duskbringer gains indestructible until end of turn. At the beginning of your end step, you may pay {1}{W/B}. When you do, return target creature card with mana value X or less from your graveyard to the battlefield, where X is the amount of life you gained this turn. Power/Toughness: 4/4"

Legendary Creature — Vampire Angel

Flying, deathtouch, lifelink

Whenever you gain life, Rodolf Duskbringer gains indestructible until end of turn.

At the beginning of your end step, you may pay . When you do, return target creature card with mana value X or less from your graveyard to the battlefield, where X is the amount of life you gained this turn.