Assassin's Worm

A thread in your hand becomes a long worm. The worm will remain in your hand until dropped into a consumable, at which point it will become invisible to the naked eye. Upon ingestion, the worm will invade the creature's sight, giving it disadvantage versus sight based perception checks, and the subject will become prone to convincing, giving them disadvantage against charisma saving throws. This effect lasts until a creature wakes. It has no effect on creatures immune to poison, or who cannot sleep.