Is Tainted Specter legal in Standard, Modern, and Commander?

Tainted Specter is legal in: Legacy, Vintage, Commander.

Tainted Specter

Q: What type of card is Tainted Specter?

Tainted Specter is a Creature — Specter. Its oracle text reads: "Flying{1}{B}{B}, {T}: Target player discards a card unless they put a card from their hand on top of their library. If that player discards a card this way, Tainted Specter deals 1 damage to each creature and each player. Activate only as a sorcery."

Creature — Specter

Flying<br>, : Target player discards a card unless they put a card from their hand on top of their library. If that player discards a card this way, Tainted Specter deals 1 damage to each creature and each player. Activate only as a sorcery.