A type of Illager that uses poison tipped arrows with crossbows, plays with various toxins and some bioweaponry, and can trade with Players and Villagers unlike most other Illagers, with the catch that the trading pop-up doesn't show the name of what they are handing to you, being titled either "Miracle Cure", "Healing Potion", or "The Antidote", depending on the situation and time. They wear the outfits of Plague Doctors as a disguise to further show a facade of being a legitimate medic. Toxicists are never seen in Raids, only spawning in some Woodland Manisons, near some villages, and in their Labs.

Based upon this instance of a toxicist if you are curious on how I got the idea ;)