You could do something like: Who can gather 100 fortune cookies in the fewest amount of turns.
For me though, I am not interested in competing with others. I just want a solo challenge that I can work at over time. Something that is not impossible but a challenge none the less. And I don't really want to abuse any scum tactics. But I am glad it helped others get ideas.
I like the idea of a time limit though. So I was thinking maybe corruption could be the timer. Keep all the orbs in, that way the gate can't be closed. Then it would have to be completed before corruption consumed the PC.
We'll see, I am in a middle of game right now, so I am gonna finish that first. Then I might try it without the orbs in the list and get a feel for it.