Barry has never seen Aaron use his Necromancy skill before this. He maybe used it to create his army of monsters before but now that there are no corpses around, he no longer uses that skill.
But he is not dead yet. Barry doesn't know whether it's because of his Void Manipulation skill which he uses to heal himself, or Necromancy which he uses to maintain his life despite all that wounds.
Or he uses both if it. Summoning energy from the Void dimension, and using Necromancy to prevent his death.
A power to combine two Rare-grade skills together to cause extraordinary effects was most likely carried out by Destruction himself.
Barry can't tell for sure. But he believes that now is the right time to use the power of his white shield after all the efforts he, Danny, and Seraphina put in turn meaningless.
