Soul Class
The path to acquiring a Soul Class turned out to be much more straightforward than he assumed. On Quanoth, Digitization merged body and soul and this had as many cons as pros.
The downside was vulnerability. On Quanoth, few believed in an afterlife, let alone a heaven or hell. A destroyed body meant a destroyed or at least damaged soul.
The souls that survived their death would literally become undead or tormented ghosts, rehashing their regrets and last wishes. Some were able to regain a normal life, which could be viewed as a second lease on life, but this would irrevocably end with the doomsday foretold by the prophecy.
The perks, though he could have guessed, were unexpected... and welcome.
Soul and body being highly synchronized, they affected each other. Furthermore, Quanoth's world laws had been enacted in such a way that this singular aspect was fully exploited.