Gremlion: Offer at around 3000 glory total.
And you can ask him for more each 500, afaik.
Gives 250 energy. With Astral energy generation I had enough to use Fairy+hunter bow on each shard.
taltamir: why would you ever use a bow over a crossbow?
If the best bow artifact you can get is better than the best x-bow magic item, it seems like a slam dunk.
To be more general though, I sometimes find (depending on other specifics) that the +1 range I get on the bow can be more important than the Armor Piercing that goes with the crossbows. This is especially true going up against spell casters in the early game and/or on smaller maps.
I wonder if Glory also has any role in determining your final score at the end of a campaign game? The only explanation I got when I lost my first campaign game was that I'd conquered 12 Shards, had 800 Glory, and had a score of 16. That suggests Glory figures into the final score, but it's not spelled out anywhere...