When hallucinating, randomize dragons’ colors and glyphs among all dragon colors/glyphs, and allow messages about them to use hallucinatory colors, e.g. “The mottled dragon bites!”

Chromatic light, whose explosion attack causes you to see all monsters in random or consistently incorrect colors for a while.

Assign a different color to the Arch Priest so that he doesn’t appear identically to all the quest guardians milling around in the area.

Color priests differently to distinguish them from player monsters.