Is Phyrexian Dragon Engine legal in Standard, Modern, and Commander?

Phyrexian Dragon Engine is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Phyrexian Dragon Engine

Q: What type of card is Phyrexian Dragon Engine?

Phyrexian Dragon Engine is an Artifact Creature — Phyrexian Dragon. Its oracle text reads: "Double strike When this creature enters from your graveyard, you may discard your hand. If you do, draw three cards. Unearth {3}{R}{R} (Melds with Mishra, Claimed by Gix.) Power/Toughness: 2/2"