Is Nihiloor legal in Standard, Modern, and Commander?

Nihiloor is legal in: Legacy, Vintage, Commander.

Nihiloor

Q: What type of card is Nihiloor?

Nihiloor is a Legendary Creature — Horror. Its oracle text reads: "When Nihiloor enters, for each opponent, tap up to one untapped creature you control. When you do, gain control of target creature that player controls with power less than or equal to the tapped creature's power for as long as you control Nihiloor. Whenever you attack with a creature an opponent owns, you gain 2 life and that player loses 2 life. Power/Toughness: 3/5"

Legendary Creature — Horror

When Nihiloor enters, for each opponent, tap up to one untapped creature you control. When you do, gain control of target creature that player controls with power less than or equal to the tapped creature's power for as long as you control Nihiloor.

Whenever you attack with a creature an opponent owns, you gain 2 life and that player loses 2 life.

Power/Toughness: 3/5

Set Forgotten Realms Commander

Rarity Mythic Rare

Mana Value 5

Artist Chris Rallis

Collector # 53

Scryfall