As an action, you can create a vial of liquid that looks, smells, and tastes almost exactly like water. However, it is actually deadly poison. A detect magic or detect poison spell reveals its true nature.

A creature can drink the contents as an action, becoming affected. An affected creature suffers no effect. Every hour while affected the creature must make a Fortitude saving throw.

On a failure, it is exhausted 1.

Any affect that removes poison can end the effect.

Often given at dinner, with death from exhaustion occurring around midnight.