The Call of Monsters

People might used to have worshipped the Olympians, but I never did. I'll kill every last one of them to get Hephaestus back.
I used to love my Greek mythology classes until I got kidnapped and actually met some Gods. I took Hephaestus as a lover and Hades and Persephone are not all that bad, but the rest of them?
They hurt my monsters. Zeus kidnapped Hephaestus and is doing who knows what to him for making a knife when it was me that used it to kill Demeter. The Olympians took Hephaestus because they can't even entertain the notion that a lowly half demon killed one of them.
I know why no one said anything when Zeus came to the Underworld. I know there's a plan to get Hephaestus back. There's also a lot I don't know that I need to learn fast. I have this mysterious demonic form from my father that I need to learn to access. Hephaestus made all these weapons capable of taking down Olympians if they came, but I don't know how to use them. I'm not going to get lucky again like I did with Demeter.
I have to learn all this and I have to learn it in a hurry because I know between Hades and my father, if I don't, I'll be grounded in my room when everyone tries to rescue my God. And I've got a personal beef with his father for all the hurt he did towards Hephaestus.