User blog comment:FeaturedMe/Feat's Anime Review - Episode 149/@comment-4999650-20120922104145

I liked how Cobra mentioned they all had to sacrifice something to learn a newer magic, and it would explain why Mira and Racer had that long scene which led to his defeat lol but what I want to know is.. did Erigor willingly give up his memories to join the OS? I was under the impression he was brainwashed into joining them