While it might seem odd to use a kappa's bodyparts as a relic, it's been done by real Japanese shrines and temples. Of course, those kappa remains almost always turn out to be mummified monkeys and similar upon closer inspection.
the number of worshippers will increase just like that!If I make this kappa's arm up like it's a divine goshintai,
Goshintai: an object in a Shinto shrine that houses a god.I brought the stuff you asked for.Just what are you trying to do?