After talking to Pax Klanq he will ask you to spread him around Qud in four ways of your choosing. A body part of your choice will become infected with "Klanq" and you will gain the ability to puff spores. As to what specifically you puff on, this seems random. If one requirement is impossible to complete due to a bug, attempt another location.
Ex: red rock was a fungal forest in my game, could not puff in red rock
Ex: antelopes were not registering, so had to find a rustacean corpse to puff on