User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-3146930-20130720154210/@comment-6064271-20130721014634

well i agree with what belkelai said and adding to that: remember it is mentioned by frank (i think) that when the gods were in greece Hades was just the god of the underworld and that he was more of a death god, which would explain why Nico has alot of control with the dead. Also i dont think Nico can control the earth, I think he can crack the earth open only when summoning the dead. Frank also said that when the gods went to rome Pluto became became the god of the underworld and of wealth so everything that is under the earth belonged to him. This explains why Hazel only has control with everything that is under the earth. Maybe Hazel wouldve also had control over the dead if it werent for the curse, maybe not. I dont think she wouldve, but thats my opinion. Also i belive Thalias and Jasons powers are so alike because Zeus and Jupiters powers didnt really change like Hades and Plutos did. In greek and roman Zeus/Jupiter is the god of sky and lightning, only his personality changes which explains why it is said that Jason is more self rightous and respects the rules while Thalia is more free spirited and does things because she wants to do it.