Kane did nothing after his first attack failed. He merely crossed his arms and gave a glance to Vlad, a glance that told a whole story that only he and Kane would know. It was the exact same glance that Kane gave Vlad moments after he was instructed to test his powers for the first time. The same glance the boy gave the man before releasing a wave of destructive energy that wiped out the testing room he was in along with the dozen or so lab hands that were in the room with him. This single look would tell Vlad that Kane wanted to do it again, to let go and wipe out a room regardless of who was in it.