D&D 5.5e Dungeon Master's Guide
Poison
Varies Natural, Elemental Earth
creatures that inhale Essence of Ether must succeed on a DC 15 Constitution saving throw or have the Poisoned condition for 8 hours. The creature also has the Unconscious condition while Poisoned in this way. The creature wakes up if it takes damage or if another creature takes an action to shake it awake.
This brown orange gas, contained within a ceramic or glass vial, is often used by bandits of Nor to kidnap people for ransoming later. It's made from an alchemical reaction of a strong acid and Ether stone.
Cost: 300 gp
Weight: .1 lbs.