Garfield the Deals Warlock

Garfield the Deals Warlock is the sales associate at the Fantasy Costco. He handles all of the buying and selling at the Fantasy Costco. While early episodes included other employees and mentions of a manager, he now appears to be the only person that works there. In the series recap from The The Adventure Zone Zone, Griffin referred to him as the "proprietor and sole employee" of Fantasy Costco, and in episode 58, he appears to have ownership of the store, so this is likely to be a retcon.

History
The boys frequently encounter Garfield during their shopping trips and make several deals with him.
 * Episode 17: Magnus beats him in a test of mercantile wits, allowing him to purchase the mystery bag, the Lens of Straight Creepin' and the Tankard of Potent Drink for 700g.
 * Episode 28: Magnus purchases the Shield of Heroic Memories and the Glutton's fork in exchange for 1800g and his old shield, signed in blood at Garfield's request
 * Episode 40: Magnus exchanges his old chest plate and some blood for a rapier.
 * Episode 50: Magnus purchases the Grappling Hook and the Pocket Workshop for 1800g and five hairs from his sideburns. Taako exchanges The Slicer of Tapeer-Wheer Isles for the Flaming Poisoning Raging Sword Of Doom.
 * Episode 58: Taako trades the Flaming Poisoning Raging Sword of Doom for some of Magnus' blood, though he used Drawmij's Instant Summons so he could get it back later.

Featured Episodes

 * Ep. 17: Lunar Interlude 1 - Carnival Chaos
 * Ep. 28: Lunar Interlude 2 - Internal Affairs
 * Ep. 40: Lunar Interlude III - Rest & Relaxation
 * Ep. 50: Lunar Interlude IV - The Calm Before The Storm
 * Ep. 58: Lunar Interlude V - Reunion Tour - Part One

Trivia

 * Garfield the Deals Warlock was originally used in My Brother My Brother and Me Episode 255.