Slithering tracker

A Slithering tracker is a creature turned into an ooze in a ritual known to hags, liches and priests that worship deities of vengeance. The ritual requires the target to be willing and to be motivated by revenge. In the ritual, all the moisture from the target's body is drained, but their mind still live on it.

Hunting Habits
They are known to locate their victims by tasting the ground, and tries to kill one by draining their blood whilst suffocating the prey with their slime form. Once a slithering tracker kills a creature, their body turns becomes tinged with blood and leaves a visible trail of it as well for a certain unspecified time.

When a slithering tracker fulfills their vengeance-seeking quest, they either expand it towards other creatures or descend into madness, attacking without pause until it is slayed.