Yes, I believe that Shimada used Sanko's bones to become Shimada Death.I literally just realized the whole black triangle and cd cover is a reference to pink floyd's dark side of the moon lmao
btw you guys think Shimada is immortal and all-powerful because he used another Sanko's bones?
Damemaru is, with a really high change, (Dorohedoro spoilers) Chidaruma after he lost his bet with the other devils.Hmm, theory time: Damemaru and Shimada both offered up A Zaha Sanko's bones. I'd guess Shimada Death wished to never be in danger again or something, or to have as much power as they wish...and that Damemaru wished to be eternally young. Which is why he insists he's 15 and immortal.
Whatever the wish granted does, it's like it's being granted by something that doesn't understand normality...