Pretty sure that was an amalgamation of all the corpses that Dr. Demento created in his wake. I'm sure they'll be more than happy to get to take a bite out of him.
This manga never ceased to entertain, good stuff
That being said, the great spirit never said anything about returning the concealed stone with its power intact
i would LOVE to see some more body horror and grotesque amalgamations from Dwight. When dealing with necromancy surely theres more you can do aside from just skeletons
That's the thing about facing-off against mages who know Necromancy; the more bodies you drop, the more minions and material you give to your opponent.