Jim is a workaholic and caffeine addict. He is always mining, logging, and ravaging all of the town's natural resources, leaving destruction and homeless critters in his path. He also has many sponsorships for energy drinks in exchange for free products and swag. He rarely sleeps, but when he does, its with his eyes wide open.
Each mastery level adds another card to the cardpool for defeating Jim. 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.