Stopped Hour Cordial

The colour of weak tea, with a single grain of sand hanging dead centre of the vial, never falling.

For six hours nothing in the drinker's body advances: no bleeding, poison, disease, hunger, thirst, suffocation, or rot progresses by a single step, and a drinker at zero hit points cannot die. For those same six hours no healing of any kind takes hold on them, and wounds already open stay open.