Pallida-Uraei is the mob in Trial 6.4. She's a uraeus. She is tethered, meaning that she cannot move beyond a certain distance from a fixed point. When she gets low on hitpoints, she splits into three separate snakes.

A uraeus was an ornament worn on the forehead by kings and queens of ancient Egypt as a symbol of sovereignty. It represented the cobra-godess Wadjet rising up in anger to destroy the monarch's enemies with her fiery breath.

This trophy was added to the game in version 1.69.