Lord Corpse is the Frankenstein creator who set up his base of operations in a village of constant thunder storms. After spreading fear and terror there for a year, John Doe was hired to kill all of his Frankensteins. John and Rose then killed the Lord for their own purposes.
It's unknown when he exactly he turned into a Frankenstein and became the leader of Blitz Guruda.
(Source: Embalming Wikia)
Content compiled by AnimeList.moe from publicly available sources.
