User blog comment:Clovis77th/Similarity between Jack the Ripper's mystery and the Hassan/@comment-49.146.192.146-20170422000701

Eventually, IIRC, in the Nasuverse, if the Heroic Spirit has the high levels of mystery in their legends, their powerlevels rise up as well. Sadly, they're still Assassins, the weakest of the bunch, yet one of the OP classes in F/GO's gameplay.