Pharyngeal Jaw

''Couched deep in the recesses of your esophagus lies a second jaw, studded with sharp teeth and hungry for flesh. With a powerful contraction of muscles, you can expel it from your mouth to strike at foes. Those given over to superstition say that the hidden mouth has an appetite of its own, an appetite whetted by blood spilled in the thick of battle, which can only be truly satisfied by devouring the brains of the fallen. Many perfectly civilized folk have the hidden jaw, but who knows what secret hungers they might contemplate in the dark before they sleep.''

If an attack targeting the head rolls triples, the pharyngeal jaw shatters the enemy's skull and devours their brain, killing them instantly. The pharyngeal jaw is deep in the throat, and thus does not impair the use of standard armor.