Is Possessed Nomad legal in Standard, Modern, and Commander?

Possessed Nomad is legal in: Legacy, Vintage, Commander.

Possessed Nomad

Q: What type of card is Possessed Nomad?

Possessed Nomad is a Creature — Human Nomad Horror. Its oracle text reads: "Vigilance Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1, is black, and has "{2}{B}, {T}: Destroy target white creature.""

Creature — Human Nomad Horror

Vigilance

Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1, is black, and has ", : Destroy target white creature."