You can find a Wight in the Waterfall Cave Dungeon, located by traveling ... and one piece of material will be required to pull this off — Black Crystal. There is one known option for you ...

If you go to the Waterfall Cave, be wary of a Chimera lurking inside. When you defeat a wight, search the ground for a Black Crystal. They'll only drop one at a time, so it will take a while to ...