Skeleton Dragon
Creepysoo and the others saw a huge group of dark clouds suddenly form above them. A few seconds later, numerous lightning arcs came down upon the Necropolis and they thought that they were going to die.
Ascalor did not think much of the attack and focused on escaping the current battle as their group would just be a distraction for the imperial army. Ascalor used one of his dimensional wings to transfer all of them away from the Necropolis before the lightning could even hit them.
They were only able to escape only due to the unique properties of Ascalor's wings. Ascalor's golden wings that look like four spatial rifts with golden metallic outlines are extremely rare as he is not a normal demon. Ascalor's specific species is Kaiser Raumos which is said to be only born once every eon.