[@BladeSS4] Unfortunately I'm going to have to say no to this character outright. At first I thought it was just a matter of clearing up how certain things in the series work, but given how you've described how his particular magic is so different from the series' normal spirit magic by design, I don't think I can allow it even if it were to be tweaked. The whole reincarnation/regression angle, the spirit binding, and so forth--by the time we finished critiquing and making everything work, it'd be a completely different character. If you have questions I'd be happy to go into more detail, but this character probably just needs to be reworked in his entirety.