Is Xathrid Gorgon legal in Standard, Modern, and Commander?

Xathrid Gorgon is legal in: Modern, Legacy, Vintage, Commander.

Xathrid Gorgon

Q: What type of card is Xathrid Gorgon?

Xathrid Gorgon is a Creature — Gorgon. Its oracle text reads: "Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) {2}{B}, {T}: Put a petrification counter on target creature. It gains defender and becomes a colorless artifact in addition to its other types. Its activated abilities can't be activated. (A creature with defender can't attack.) Power/Toughness: 3/6"

Creature — Gorgon

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

, : Put a petrification counter on target creature. It gains defender and becomes a colorless artifact in addition to its other types. Its activated abilities can't be activated. (A creature with defender can't attack.)