I found Nuyasan in the abandoned temple in Qualisar. He has some spices in his inventory. When you use them, your stats change a bit but what's more interesting is, they seem to cause some kind of quake. At least it looks that way. Maybe it's supposed to imply these spices are slightly toxic. I have no idea.

Does anyone know whether these spices are useful for anything? Are they just some pointless gimmick? I imagine you can either poison someone with it or make something collapse with the quake effect.