The Anti-Likantra Potion

Matid: "There's no bathroom in here, so I don't know what that little boy was doing, but he had to make business someplace" Barney: "Can I like sprinkle a little bit of the anti-likantra bead stuff on the flower just to like see if it's like got poisonous things?" Matid: "I'm wondering if this isn't some sort of poison and maybe a hamlord poisoned wolfman. ... Sure, but you need to make me a constitution saving throw first."