Longmont Potion Castle has been played on NTS in shows including Brain Dead Radio, featured first on 9 February 2018. Songs played include Liter Of Salad, Rope and Squid Sandwich.

Longmont Potion Castle are odd prank phone calls coming out of Longmont, Colorado. Mr. Potion Castles real name is unknown, however it is known that he is friends with the creators of South Park. Also proficient with rope, and the only one on the dock; has a strong fondness for Killians, but will settle for a Mike's Hard Lemonaide if push comes to shove.

If you really want to meet him, you can find him out in the parking lot, brandishing a tennis racket. Wear a lip guard.