Is Shard of the Nightbringer legal in Standard, Modern, and Commander?

Shard of the Nightbringer is legal in: Legacy, Vintage, Commander.

Shard of the Nightbringer

Q: What type of card is Shard of the Nightbringer?

Shard of the Nightbringer is a Creature — C'tan. Its oracle text reads: "Flying Drain Life — When this creature enters, if you cast it, target opponent loses half their life, rounded up. You gain life equal to the life lost this way."

Creature — C'tan

Flying

Drain Life — When this creature enters, if you cast it, target opponent loses half their life, rounded up. You gain life equal to the life lost this way.

Set Warhammer 40,000 Commander

Rarity Rare

Mana Value 8

Artist Pierre Loyvet

Collector # 55

Scryfall Gatherer