Clabbert pustule

A Clabbert pustule was an adaptive feature of the Clabbert. Located on the forehead, this pustule flashed red whenever the creature sensed danger, leading wizards and witches to keep Clabberts on their property to warn them of approaching Muggles.

Clabbert pustules were used as an ingredient in potions. An unknown quantity cost ten sickles at an apothecary in Diagon Alley.