Certain custom dice can turn into Super Dice. This ability is activated when players get more than one of that types of dice! Super Dice have cosmetic effects

 

Super Dice will be indicated by a small symbol in the upper left of that dice's listing in My Collections:

Once you obtain multiples of a Super-Dice capable dice set, it will automatically turn into the Super" version:

 

 

Special "Super" visual changes can vary depending on the dice! (Shimmer, Particle Effects, Droplets, etc.!)