Wildcards are special items that can help to fill the Inventories of Wubbox, Wublins, Celestials and Amber Island Vessels. When selecting Fill while viewing a Monster’s Inventory, you have the option to use Wildcards. 

Using Wildcards instead of Eggs reduces the Diamond cost required to fill the Inventory. The number of Wildcards needed depends on the complexity and rarity of the Monster or Egg being replaced.

Wildcards can be earned by: 

• Early Ascension failure (Celestial Monsters only)
• Collecting from the Nexus Nucleus on Magical Nexus 
• Collecting from Minor Paironormal Monsters on Paironormal Carnival