Cursed artifact

The shadows converged on the book on Uriel's hand and a black liquid dripped from it, casting the shadow of a tall muscular man. Uriel remained still as the shadow took over the fight against Cassandra.

Although Uriel didn't issue a command, it seemed as though the shadow was created for the sole purpose of following his will as it performed flawlessly against the heavenly rank huntress who now was having trouble remaining on her two feet after the earth began trembling. Something about the shadow's strange ability reminded him of someone, but he couldn't tell who exactly until he saw its fighting style.

It was Shaker's shadow, summoned by the book of the dead from the afterlife.

Uriel couldn't believe his own eyes and he wondered how was it possible, considering he was absolutely certain that he killed Shaker, but then he remembered that while he was inside the dark pit in Hunter's lane he saw Atomic and now he was certain that he was the real one.