He was empowered by Shock? My interest deepens: I don't remember this, only that they're partners--and that I wanted to read more about them.
Anyway, if we look at it that way, Shock is still his ultimate goal--an unsurpassed goal. Holding his own is one thing--being so empowered, surely he could do it--but that's where it stops: Hades has an enormous tactical advantage--there's no way for True to take the high ground, there.
There's something else that caught my mind for a while, now: the name of Hades' subordinate, Kimujina. Sounds like a mix of two words:
木 - き - ki - "tree, shrub, bush"
狢 - むじな - mu ji na - "badger" or "raccoon dog"
Another word is commonly used for "badger" instead of mujina, and tanuki is the word used for "raccoon dog" (either the animal or the yokai), so mujina is commonly used to refer to the shapeshifting badger yokai. An arboreal mujina.
What Horaigon is is still beyond me, though. (I have an idea, but I'm short on time.) I'm also wondering if I should know who Chikaeru is, on top of that.