Parasitic fungus that hijacks an insect's nervous system, forces it to climb high, and erupts from its head. Source material for The Last of Us.
From Wikipedia
Cordyceps is a genus of ascomycete fungi that includes over 260 species worldwide, many of which are parasitic. Diverse variants of cordyceps have had more than 1,500 years of use in Chinese medicine. Most Cordyceps species are endoparasitoids, parasitic mainly on insects and other arthropods ; a few are parasitic on other fungi.