My idea for the end of Eye of the North is the opportunity to craft a truly unique green weapon. A green weapon which would we customisable in every way, that is, you can choose the requirement, the inscription, and everything else. You could have a sword, with req 9 death, and curses +1 (I know, why you'd want that...god only knows. It's only an example ok?). This would perhaps be particularly beneficial for Foci. In Elona, due to the inscriptions, if you have an Energy Storage focus you have to have a HSR Energy Storage (20%) mod on it...what if I want Air Magic?
To make sure that those weapons crafted are to be kept by the crafter they should of course be automatically customised.
One last form of customisation is, of course, the name. Any wammos out there ever wanted a sword called "Dragon Lord's Leetness"?

Perhaps buyable at the end of the game for 50k. Endgame greens with a twist. We're heroes...are we not worth it? If Bazzr Dustwing can have a staff named after him I WANT ONE!

EDITED TO CLARIFY ORIGINAL POST
Some people seem to have said things which were in my mind at the time I wrote this but sort of took it as a given...
1. Req 9 only weapons....otherwise everyone would make req 7 weapons...which would be stupid.
2. Only able to apply weapon modifiers which are currently around. Eg. No Armor +7 vs ANY damage...
3. Automatically Customised (although I think I said that above)
4. Limitations on naming: eg word filter...such as the one we have on naming our characters.
5. Specially designed skins. I agree it would be a bit harsh to people who have spent thousands of ecto on a crystalline sword if you could choose that as a skin for the endgame green.
6. It would be a one-off purchase. Once the personalised, customised green weapon it crafted it then acts like a green weapon. It cannot be re-modded. It cannot be sold to other players due to it's customised nature, it cannot be dyed (perhaps dye colour can also be chosen at creation), the name of the "inscription" is removed and only the stats are shown, it can no longer be remodded.
7. Character limit on the weapon name. Eg. 25 characters so there will be less "The Pwninator's Uber Noob Pwner of the World".