XIETIAN
Hmm so Fragment approval, soul purity, Blood Manipulation, maybe Regeneration (maybe it's been regenerating his body if it was breaking?), and maybe the Lightning Movement fruit (idk how this would be a factor but I feel like it might)? I feel like his abnormal requirements are part of Sirius's trial, or at least an additional challenge for getting approval before the Soul Record. Now that I think about it, it would be interesting if Sirius somehow increased the rate of evolution of Earth. Thanks for the chapter!