Gladys had one chinchilla, but somehow one chinchilla became two, two became four, four became sixteen and so on. She's never lonely with her infinite chinchilla friends, which at this point, seems to have no limit. Armed with fluff and an advanced degree in math, no one can resist the acuteness of her chinchillas.
Each mastery level adds another card to the cardpool for defeating Gladys. Each of the bronze, silver, and gold mastery levels unlocks a new card, while it takes all three diamond and onyx levels to unlock a single card.