Invasion of Dominaria [March of the Machine]

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it’s defeated, exile it, then cast it transformed.)

When Invasion of Dominaria enters the battlefield, you gain 4 life and draw a card.

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Serra Faithkeeper

Flying, vigilance
Rarity: U
Card Number: #21
Type: Battle — Siege // Creature — Angel
Flavor: “I was there when Phyrexia doomed Serra’s realm with a single touch. I was there when Yawgmoth tried and failed to conquer Dominaria. And I will still be here when Elesh Norn lies dead.”