Raze had used the special technique he had learned from the Dark Faction founder to allow him to arrive in Alterian in Spirit form.
Due to his increased cultivation body strength, his spirit body was more and more real in the other world while using this technique. Less mana leaked out while using it, and he had more powers than he did before.
Still, there was always one worry that Raze had to be concerned about. Although it didn't matter if the spirit was hurt, it could simply heal its body with more mana; this was not true for the real body.
There was a reason why all the times before, Raze had continued to use the technique while he was stuck in a cave. It was due to the safety of it all.
Using such a technique put him at a large disadvantage and in more ways than one. One of them being that it took up mana.