Zatiel's eyes were sharp as he felt the changes in the billions of drones inside his Inner Universe.
It was not only their bodies, the ones that the Samsara Thearch was going to change since he began to create soul dimensions inside each and every one of their brains using the killing intent and broken souls obtained from the implosion of the Nightmare Inferno Realm.
Those were unlike normal souls since there was only a primitive desire to destroy their target and kill, no matter what. Zatiel implemented that change since, even for him, controlling every move of trillions of puppets with his mind would be hard, but if they instinctively attacked, it would be much easier.
After six months, the Samsara Thearch was finally able to rest since the evolution of the drones was over.
Their cells had already reached their saturation point, and their bodies were immortal, allowing them to keep fighting even if their heads or hearts went missing.