Zayne had limited time, but so did Enar. Even though he was an Apostle, his energy was not infinite. He activated the seal and gained great power, but like Zayne it was not forever. Their situations were quite similar in some ways.
Enar and Zayne stared at each other, then they simultaneously lunged forward. Zayne drew his sword from the wall and immediately turned around, facing Enar, who brought his two blades down on Zayne.
Clang.
Along with the sparks flew flecks of blue flame, which, like tiny crystals, left cuts on Zayne's face, then they collided again.
Zayne and Enar tried to overwhelm each other, putting more and more power into their attacks and gradually getting faster. Each time, Zayne was slightly wounded, but the scratches on his body quickly healed like a beast, and the ice on his claws shattered on the next encounter.