Darklord Crystal
闇王晶 [yami-ou shou] or 'dark king crystal' in Japanese.
Grimoire of the Rift

Buy: - (sell: 5,000 gil)
Use: Death Claws, Diabolique, Ebon Blade, Heretic Rod, Black Hat, Magick Robe
Reward: Survey No 259 x5 (once), Wish Upon a Star x2 (once)
Type: Magicite, Rank: ★★★
Description: Legend says that a great spirit of darkness lies trapped inside this crystal. Do not look upon the pulsating shadow within overlong.
Final Fantasy Tactics S

Buy: - (sell: 500 gil)
Use: ?
Obtain: Western Orda Woodsea/Devils' District lv60+
Description: A very uncommon piece of magicite
Category: Item