Heaven's Lost Guardian

Synapsians forever created Angeloids to do their bidding and to grant their wishes, but that life eventually became boring. The commander of the Angeloids started to abuse them and beat them for his own self pleasure, but the two creators of the Angeloids refused to let it continue. They both built a particular Angeloid that would kill the commander and end his selfish ways... but the Angeloid was defeated and captured. As a last resort, the two Synapsian creators decided on a plan that could end the very world if they were not careful. One of the Synapsian creators underwent many augmentations and alterations to his body, creating a Synapsian Angeloid Hybrid: The Guardian of Heaven.