At Once
However, these were only minor in comparison to the true root of his strength. After learning the importance of perfecting his constitution before transcending, Chenglei, who had once arrogantly ignored his constitution, treated it like his treasure trove.
He vastly improved, relying on Junior's expertise to carve out a smoother path for himself.
He knew what he needed to do. If he wanted to avoid the fate of being mediocre on the Immortal Plane, he had to carve out his own path, a path that didn't just rely on the Sovereignty of the Dragon Race… But didn't entirely ignore it either.
Orcus failed to ever gain a Higher Existence corpse puppet for himself, but that was because he was too weak to kill Higher Existences without the assistant of his undead.
However, Chenglei would be different, he would be a Necromancer that could stand on the frontlines along with his puppets. He and Dyon together would strike fear in any battlefield they stood upon.