Curse Dice appears in the Harabah Block of Tartarus, from floors 191 to 200. They will attempt to use their Infuriate skill to leave the party attacking their strong points while they in turn attack for increased damage.
Curse Dice appear in Paradise 3 through 5 in Heaven within the Midnight Channel. They will generally accompany other Shadows on the field. They will only Stand By while other Shadows are present and their Last Resort skill may be a bit more damaging than usual due to their slightly higher magic stat. Defeating a Curse Dice may yield a Cursed Stone. Selling 6 Cursed Stones at Daidara will unlock the Mjolnir Boots for Chie Satonaka in the shop.
In Golden, they appear in Paradise 1 to 4. They may also drop Buffalo Stone for trade at Shiroku Pub.