Silver Dice appear on floors 7 and 8 of Marukyu Striptease within the Midnight Channel. They will typically be accompanied by other shadows which occupy the same floors. It will use Last Resort on its turn if it is the last Shadow remaining. Upon being defeated, they will drop the Silver Lump material. Selling 4 Silver Lumps at Daidara will unlock the Type-98 Gunto sword for the protagonist in the shop.
In Golden, Silver Dice appear on floors 5 through 8 and 10. It may drop Olive Stone for trade at Shiroku Pub.