User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4902593-20121231082604

I think Percy might end up more powerful and very skilled in fighting if he survives (and succeeds) Tartarus although it may emotionally drain him. That would put him in a more vulnerable position since he would be much more powerful than the rest of the seven and Gaia would try to isolate him from the rest of the demigods. Atleast that's my prediction.

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