Waterskin of Voices
This leather waterskin has a magical beverage inside that allows you to briefly alter your voice. When found, the waterskin has 1d6 + 4 servings. You can drink 1 of the servings while holding the waterskin using an action. When you do, choose a voice from a creature you've heard or one from your imagination. The next 25 words you speak within 10 minutes sound virtually indistinguishable from the voice you chose, though a successful DC 20 Wisdom (Insight) check reveals that the voice is magically altered. If the voice you chose belongs to another creature, that creature automatically knows that the voice is altered.
The deep, commanding voice of the king practically leapt from the gnome's mouth, "I, too, enjoy sunbathing in the nude. Save for my socks: those must remain on for optimum comfort. This I officially decree, as the king." The rest of the group giggled once more, but quickly turned to raucous laughter. "Okay, okay, okay," wheezed the gnome, wiping tears of laughter from her eyes. "Just one more. We don't have a bunch of swigs left of this." An outpouring of suggestions and pleas sprang from her companions. Despite their best intentions, one drink turned to 4, and the waterskin became empty all-too quickly. "Worth every gold piece," sighed the gnome. Her face was flushed, and the rest of the room was in disarray. Most of the room's furniture had, of course, been used as props over the course of the evening. The inn had thin walls, but was surprisingly well furnished. Little did the party know, but they were single-handedly responsible for an untold number of future rumors about the king's supposedly peculiar sunbathing habits. The accidental slander would, over years, result in a cataclysmic uprising and overthrowing of the royal family.