Prove to me it doesn’t have Odens haki imprinted into it? I mean now we know dude can heal from advanced COA attacks fine. But then said the one attack Oden used(with both swords mind you, using his haki) is unable to fully heal, thus the scar. So tell me what we should be thinking other than the sword itself having been imprinted(cursed) by his haki?
Because enma stopped kaidos regen maybe.