Christmas Tree Monsters are luminous vegetables that roam freely amid the glacial valleys of the south and migrate during autumn, when the trees cheerfully trample everything in their path.

Christmas tree monsters are repelled by caterpillars, but nobody can explain why. The most recent sighting of these creatures was in 966 GUE, when a horde of 69,105 of the creatures descended on Thriff village. For a few days the village was protected by magic glyphs designed by the enchanter Orkan, but then a nearby volcanic eruption caused the entire horde to burn to death.