He wasn't really going to use it on him since it would do nothing but erase his body and current consciousness, giving him a chance to be revived in a different place where evil energy existed.
But Lucifer didn't know that.
He felt his bones twitch in fear at the sight of the void domain, believing that it was the same ability used to erase him before.
'Mother won't revive me again if I die. I don't know why he wanted me to possess his body, but I have no choice but to accept.'
Lucifer knew that his fate was no longer in his hands...The fact that Felix's spiritual pressure was empowering him was enough to make any action or thought invalid.
'But, how am I supposed to win against him in a spiritual battle?'
Lucifer's expression wasn't so good.
Even if he wanted to fight it off with Felix and possess his body, he wasn't delusional to believe that he would win in a spiritual battle after this display of power difference.