Corgi wiki

A corgi with the rune on its forehead.

The mysterious rune is a rune that has appeared on the foreheads of several creatures within the dungeon, specifically the Kobolds, the Corgi Warriors, Baroness Puffington von Berrywing, Huo Quan Shan Gou, and the Belostomatid. Each of these creatures was hostile to the party for as long as they bore the rune. When the party defeated Puffington and Shan in combat, the rune faded from their foreheads and they ceased being hostile to the party.