Encyclopedia Magica Text[]
This potion allows the imbiber to breathe a colorless, odorless cloud of sleep-inducing gas up to three times within an hour after drinking it. This cloud is effectively a 20' x 20' x 20' cube. Within the cloud, creatures are affected as if struck by a sleep spell, the effects of which are exactly duplicated by the cloud. If the thief does not breathe out a cloud in this way within an hour after drinking the potion, he or she must save vs. spell or fall into a deep, comatose sleep for 1d4+4 turns. This potion is obviously of great value for a thief when dealing with numbers of low-level and peripheral guards while working.
The Complete Thief's Handbook Text[]
This potion allows the imbiber to breathe a colorless, odorless cloud of sleep-inducing gas up to three times within an hour after drinking it. This cloud is effectively a 20' x 20' x 20' cube. Within the cloud, creatures are affected as if struck by a sleep spell, the effects of which are exactly duplicated by the cloud. If the thief does not breathe out a cloud in this way within an hour after drinking the potion, he must save versus spells or fall into a deep, comatose sleep himself for 1d4+4 turns. This potion is obviously of great value for the thief in dealing with numbers of low-level and peripheral guards when he is trespassing, breaking and entering, etc.