The inhalant magical item that Raze had used, was a gift he had recently received from his last visit to Alterian. One that had some of the largest side effects he had ever heard of.
It was an item designed for mages in the military, for those that had no idea how to breakthrough using their magic core the inhalant would force one to breakthrough.
A power that mages used that was incredibly powerful a burst and a last resort. Raze hadn't had the time or chance to learn how to use his breakthrough.
Due to him having a Dark Magic core, he had no idea how he was meant to break it, he had only done so once during his battle with Sha Mo.
Its effects, it aged him back to the old Dark Magus and returned all of his powers prior. It was hard to say if the Raze now was stronger or weaker than he was in his past life.
