A Dice Goblin Head & Green Essences - Yellow Numbering. Inclusion Dice are a wide variety of customized dice designs that contain unique items of any possible material or design actually inside each die! As every set’s design is entirely unique. These ingenious sets are identified by their inclusions! Every set comes in the GKG Dice Tower Dice Case! Made of high-impact resin, with the same layering process we invented in 2013 that prevents air-bubbles from forming inside, Gate Keeper Games dice bear the honor of being the heaviest, densest, and most well-balanced resin dice on the planet!