Reward concept: Craft on items then pick 1

Concept:
Imagine a reward window like Ritual, but you can craft on it.
You can craft on all items, but in the end you can only take ONE.
Maybe a variant where it's like Guff-crafting (i.e. you can only use shown currency)

Final thoughts:
Would make for a great sink. Would maybe pair better with the endgame than IDing items.

I believe this is what expedition members (Rog, Tujen, Gwennyn) do with the artifacts. Dannig will let you exhange the currencies around a bit.