The Necromorph Pustule is a grotesque, organic growth with a bulbous, asymmetrical shape, resembling a swollen cyst or tumor. Its surface is covered in a slimy, translucent membrane that pulsates slightly, revealing dark, viscous fluid inside. The exterior is mottled with veins and irregular, raised bumps, giving it a highly textured and unsettling appearance. The color palette ranges from sickly yellows to deep purples, with areas of necrotic tissue appearing blackened or bruised. Small, jagged protrusions or spines may sporadically dot its surface, adding to its menacing look.