The primordial jungles of the Lizardmen are overrun with thousands of snakes and reptiles. These range from tiny, highly venomous creatures to massive lizards and pythons. Serpents are sacred to Sotek, and invoking his favour with blood sacrifice before a battle can cause huge swarms of serpents and reptiles to appear from the undergrowth and slither ahead and along the flanks of the Lizardmen armies as they march.

These Jungle Swarms wash around the legs of the foes of their god Sotek in a deadly wave, hissing and spitting, plunging their fangs into unprotected flesh. They make any sort of travel through the lands of the Lizardmen extremely perilous, for they slither into camps and force intruders to watch every step they take, sapping the resolve and will of even the hardiest warior.