Haxtec Color Shifting Metal DND Dice Set Temperature Sensitive Polyhedral D&D Dices for RPG Dungeons and Dragons-Silver Black GrHaxtec Magician Metal Dice Series offers heat sensitive metal dice that can change colors temporarily by temperature. While warmed by body temperature, like your hands, the dices turn to another color. After cooled down, they go back to original color at room temperature again. This wonderful color changing effect can last for 10 20 years before it stops. Usage: Perfect for RPG table top board games such as Dungeons and Dragons, Shadowrun, Pathfinder,