Disclaimer: I will not focus on Art or grammar, unless the latter would make the deck too difficult to understand.
Honestly, I am quite glad to see a direct Greek entity used as a submission. Given the relevant presence in the base game, I have to give a Kudos for expanding on that.
Now, for the deck itself, I quite like the way the concept of Self-mill is handled here. The mechanics are easy to understand, and steadily add pressure, without being too much at once. Particularly since The Gates of Tartaros would by nature of being the second Plan to Win drop a bit out of the blue once Kampê herself has been dealt with. It's a nice ticking clock for the player to wonder why she is self-milling like that, and then suddenly that horrifying moment of realization. I also have to give shoutout to the fluff of someone like this just appearing at the Neo-Athenian Church, and having to be dealt with. Not to mention, the excellent Lash-Out options.
Perhaps a clarification on whether any of your own cards are sent to the Grave to count might be good? This since there's still space for it, and clarity is never a bad thing for the base sheet? Some tables might play with showing the NPC cards being sent to the Grave, after all.
Good job!