Ophiocordyceps is iconic for its ability to infect ants and change their nervous system to force them to climb high, where the fungus can fruit and spread spores to infect more ants.
Pleurocordyceps is a hyperparasitic fungus that eats Ophiocordyceps. It isn't really a friend to the ants, since it has no interest in fully wiping out its host. But it makes for an interesting dynamic, and I continue to think it would make an interesting Alien movie or Last of Us sequel to introduce a hyperparasite to interact with the titular monsters!

A new species from Borneo, Pleurocordyceps cornusynnemata, named for its fruiting bodies looking like little horns, was just described for the first time! https://phys.org/news/2026-06-scientists-hyperparasite-malaysia-borneo-jungle.html