MDG Individual D20 Elixir Liquid Core Dice are infused with glittery liquid cores that swirl when rolled. Each set is handcrafted and polished to keep their beautiful sharp edges. When the liquid cores are molded into the dice the heat from molding creates a small bubble in the liquid core. They are also durable and can withstand heavy use. Beautiful and unique set of dice that is perfect for any game. Great addition to any game collection.