Double strike
When Phyrexian Dragon Engine enters the battlefield from your graveyard, you may discard your hand. If you do, draw three cards.
Unearth 3RR
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Meld Partner: Mishra, Claimed by Gix
When Melded, it becomes the following:
Mishra, Lost to Phyrexia
Legendary Artifact Creature — Phyrexian Artificer
Whenever Mishra, Lost to Phyrexia enters the battlefield or attacks, choose three —
• Target opponent discards two cards.
• Mishra deals 3 damage to any target.
• Destroy target artifact or planeswalker.
• Creatures you control gain menace and trample until end of turn.
• Creatures you don't control get -1/-1 until end of turn.
• Create two tapped Powerstone tokens.