|"I show not your face but your heart's desire."|
Mucus ad Nauseam Tria is the incantation of a curse used to give a target a head cold that increases in severity with each successive cast. It is the most powerful version of the Curse of the Bogies, though not when cast by itself.
When this version of the Curse of the Bogies is cast once on a target by itself, it appears identical to Mucus ad Nauseam Uno. However, if the recipient is already affected by any variation of the curse, including Tria, then each successive cast of Mucus ad Nauseam Tria will intensify the recipient's cold.
After Mucus ad Nauseam Tria has been cast on a target, casting the Duo or Uno variations will reduce the cold's intensity, as if the Tria version was never cast.
Mucus ad Nauseam Tria is the most powerful version of the Curse of the Bogies, because it is the only variant that intensifies the effects with each consecutive cast. Because of the way these variants work, in order to give the target the worst cold in the shortest amount of time, one must cast Mucus ad Nauseam Duo on the target, followed by Mucus ad Nauseam Tria successively from then on.
- Harry Potter and the Philosopher's Stone (video game) (First appearance)
- Harry Potter and the Chamber of Secrets (video game)