Knull (Knull #1)

RETURN OF THE KING! Weakened from his last death, trapped by the enemy he never expected, the God of the Void waits in a cage once again. His captors think Knull has nothing to fight back with - but in Knull's hands, nothing is a weapon. And there's a greater weapon out there, waiting for the King in Black to take it... and take his revenge.