The Blood God's Mission!

Deep inside the volcano, a gate blocked by magma was slowly opened, revealing a base that had been sealed for ten thousand years. Mechanical robots surfaced in the magma, hauling young Wuying Qi's incomplete body into the base, where they implanted tremendous artificial organs into his body and covered him with pieces of black armor.

The whole base was utterly silent, and the mechanical skeletons moved rigidly like fully-wound puppets.

"This is actually an enlisting base of the 'Human Expedition Army'. Even the weakest man can be modified into a well-trained warrior very quickly after they're sent into this place. If they're strong in the first place, they would be much stronger after the modifications."