At some point Percy had two of the barrels enchanted to shoot magical bullets: one with a fire enchantment and one with ice.
The name of the gun came from the inscriptions on five of the six barrels showing the names of people Percy sought vengeance against. The names on it were:
It was eventually discovered that Orthax, the shadow demon Percy had unknowingly made a pact with, was bound to him through The List. This tie was severed when Scanlan took the pepperbox and threw it into a pit of acid.
- Despite fan speculation that the sixth, blank barrel was for Percy himself, Taliesin Jaffe has stated that no specific name was originally meant for that barrel. Instead, the sixth barrel represented a new start and a new list. If Percy had killed all the people on the list, six more names would have appeared in an endless cycle.