A reptile fanatic, Hubert loves all things cold-blooded. He believes he can communicate with them and calls himself the reptile whisperer. He doesn't have much patience for the warm-blooded, but in exchange for his loyalty, the boss has given Hubert his own reptile show on television, as well as a major film with an all reptile cast.
Each mastery level adds another card to the cardpool for defeating Hubert. 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.