Is Necrite legal in Standard, Modern, and Commander?

Necrite is legal in: Legacy, Vintage, Commander, Pauper.

Necrite

Q: What type of card is Necrite?

Necrite is a Creature — Thrull. Its oracle text reads: "Whenever Necrite attacks and isn't blocked, you may sacrifice it. If you do, destroy target creature defending player controls. It can't be regenerated."

Creature — Thrull

Whenever Necrite attacks and isn't blocked, you may sacrifice it. If you do, destroy target creature defending player controls. It can't be regenerated.

Set Fallen Empires

Rarity Common

Artist Ron Spencer