[EXC] Recycling Unwanted Lightstones

You're using that lightstone, right? The one cleansed of dark energy?
How can you not remember? I totally cleansed it last time.
But yeah, um... I may not have actually told the other Adventurers
everything I told you. I was immersed in research! And they just wanted to go adventuring!
So you're 100% the foremost Lightstone expert among non-Lightstone experts.
How'd you like it? Overwhelmed by the possibilities? That's the best part!
But hey, if there are any you aren't using, you could just toss 'em my way...
II'll find some new way to use those puppies, guaranteed.
Free? Please, would a renowned alchemist like me ask for handouts?
Give me, say... three lightstones, I'll give you something nice in return.
※ You can obtain Purified Lightstone x1
if you hand over Lightstone x3 that you aren't using.

Give me, say... three lightstones,
I'll give you something nice in return.

Here's the gift I promised.
Please use it wisely since I picked it out carefully.