Weirdwater Poison (Patreon)

Potion, rare

This poison rumbles around, sloshing softly within its bottle. It looks, smells, and tastes like water: only a detect poison and disease or identify spell can determine the nature of the liquid. A creature that drinks this poison in its entirety begins to suffocate, as if by drowning, unless it can breathe underwater. If the creature drops to 0 hit points while drowning in this way, it becomes stable and is no longer drowning; when this happens, a hostile water elemental appears in the nearest unoccupied space. A lesser restoration or protection from poison spell ends the effect early, allowing the creature to breathe normally once more and preventing the water elemental from appearing.

Alternatively, you can pour the entire vial of poison onto the ground using an action. When you do, a water elemental appears in the nearest unoccupied space, as if by the conjure elemental spell. The elemental ceases to obey your commands if you fall unconscious or die.

The water elemental disappears after 1 hour.

The desert baron paraded his wealth as water, his druids draining what little remained outside of the capital to fill his garden reservoirs.

So the message was clear when, mid-feast, he drowned on his throne. He collapsed as his cherished water swirled from him, coalescing to a monstrous form.

Though it had no expression, its disgust was clear as it swiftly ended the baron's reign.