FLAME is giving up his memories before Kyriakos—of his mother, his girlfriend, his friends & the rest of his family; everything that he knew before Kyriakos; in essence all the pieces of his soul that he's regained that aren't skills.

ranked a 10 bc not only is this actual parts of his soul but also with this he's pretty much giving up a chance to save his world sooner than later.

flame is also slated to die if this sacrifice doesn't go through.