Lingua Necrotica

...or plague tongues are hideous rotting servants of the Gods of All Flesh. They stand 3-4 feet above the ground, may be summoned by clerics of that faith singly or in cohorts of up to 20, and their pale, glabrous touch does d4 damage and (failing a save) transmits an unspeakable disease.

This malady causes the sufferer to be seized with the desire to lick the nearest living being. A successful grapple causes a network of thin yellow filaments to spouts from the sufferer's skin, attaching the plague victim to the unfortunate target of his or her affections. If left unbroken, these growths will eventually grow together into a viscid coccoon connecting and entombing both parties and transforming them--over the course of days--into a new cohort of lingua.