Larian Studios Forums Divinity 2 - Ego Draconis (English) Help/Tips/Tricks invoker crystals

in Stones flying fortress I found 4 yellow invoker crystals and placed them in the generator no probs with that, but when I defeated stone in the arena I found an another one in a chest.
when I took it it says that it is a quest item, so the question is where is it for???? is it for a a later quest or must I use it in stones fortress?

You sometimes get surplus quest items: I know I've ended up with quite a few odds and ends that serve no purpose. But I don't think they add to your encumbrance, so I wouldn't worry about it...

All 5 invoker crystals can be used to disable the generator in Stone's fortress. I don't know if you can add the 5th after placing the first four.

What is the Invoker jewel used for

foud the solution:

first defeat stone and get the first in a chest in the arena, then pick up the other four.

put them in the genarator and you'll get a reward.

Yup. I just updated my thread from last night to include the proper way to use them(all 5 at once). Knowing in advance will save many of us time who will certainly reload an old save just to do it.