Rising Of The Shield Hero (Manga) Vol 21

"Did he really just start a wave?!" Naofumi and his party have arrived at Kyo's research laboratory. There, they discover countless homunculi, created as vessels for souls. Controlling the body of the mirror hero, Kyo attacks our heroes-and even has an even deadlier weapon up his sleeve! One Peace Books
(W/A/Ca) Aneko Yusagi