Are you a player or game master wishing to have an advantage at your next role-playing session? These dice have many uses ranging from dishonestly cheating to more respectable uses.
Some people let a new/younger players use the dice to have an advantage. I have heard of game masters using these dice against players who show up late. Use these dice for a special weapon advantage or they could be used by a powerful enemy.
How you use them is up to you. Note- Many of my buyers are collectors who just like adding unique dice to their inventory.