Q-Workshop Polyhedral 7-Die Set: Carved Steampunk Dice Set (Yellow and Black)
These cubes are a part of a mad scientist machinery, that was supposed to influence time fate of those, who use it. Unfortunately for the scientist, the matter of the machine warped in the process, leaving behind only those cubes with the machine carved in them. The machine still works in the dice, ensuring the paint doesn't wear off and altering the fate of those who use it.