Gobsgog

Gobsgog, known in Common as  'goblin liquor', is a black, tar-like substance distilled from bilgecap mushrooms. It is popular amongst goblin tribes across Ardor.

Properties
Gobsgog is a highly unpredictable substance when drunk by any creature other than a goblinoid. It has some minor restorative qualities, if one can stomach it, but causes a sense of paranoia that can heighten reaction times. It can cause poisoning if the drinker is unable to withstand its potent effects.

"The Cave and the Crocodile" (C1x2)
Mongo the bugbear, chief enforcer of the Needlefang Tribe of goblins, was a frequent drinker of gobsgog. He wore a flask containing two doses of the substance, which was taken from his corpse after he was killed by John. John drunk one dose at the end of the fight, replenishing his own health, before using the last one to heal an unconscious Arashi Fulgar after battling Spittlebrick and Ragvort.

"Battle in the Goblin Prison" (C1x3)
Malaxus found another flask of gobsgog on the body of Poog, the Needlefang gaoler.