LEECHER

"A leecher is a parasitic, carnivorous plant creature which has evolved in a unique way to acquire sustenance. When an airborne leecher spore lodges itself in a living person's throat, there is a small chance that it will sprout and grow. Without swift treatment, the victim suffocates as the leecher threads its way throughout the host body's systems and assumes control of basic functions. Feeding off the corpse as it decays, the leecher uses it to move to a new location in search of a new host."

-Kitterwen