A Poisonous Problem

(Complete) There are several types of creatures on the island that are poisonous or venomous, and Rota would be a bit more comfortable if the kinds nearest the town were a bit more scarce. She has asked you to first deal with the Atosis, a lizardfolk-like creature which leaves behind a trail of tasteless, nearly invisible poison powder as it stalks through the forest. The thing is presumed sentient, but seems to delight in the suffering caused by its poisons and therefore must be driven off or killed.