24 Artifacts in my Hero Arena, Give Ideas on how to use them

I have 24 artifacts that aren't uber chessy but they are a great addition to a hero inventory, however I noted that all my effort to make them wasn't worthy since the strong creeps appear once the game if close to be finnished

If you were an alpha tester I can ask you (Did you ever see an artifact?)

But , It would be great if you could give me Ideas of events or optional missions that may reward an artifact.

for what kind of map, wats the theme?

Mybe make somthing like when you've collected certain items you can combine them to makeyour uber-items. That would be fun, and detract some of the action from mindless killing (although thats fun also).

A hero arena, I just want to make more ways to get artifacts

35263526 (wow I memorized that·) I think I will make an item set system