Aetherworks Marvel [Kaladesh Prerelease Promos] Rogue before attackers are declared

before attackers are declared

sacrifice Sea Serpent

We permit only a chosen few to don the raiment

except it doesn't copy that creature's color and it has this ability

Aetherworks Marvel [Kaladesh Prerelease Promos] Rogue before attackers are declaredSet: Kaladesh Prerelease Promos Type: Legendary Artifact Rarity: Mythic Cost: {4} Whenever a permanent you control is put into a graveyard, you get {E} (an energy counter). {T}, Pay {E}{E}{E}{E}{E}{E}: Look at the top six cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.