Sevarius's Gas
Sevarius's gas is a gaseous chemical agent that was designed by Anton Sevarius to knock out a gargoyle and leave it weak and helpless for hours.
When Thailog lured Goliath and Elisa Maza out to Black Rock Point in 1995, Thailog used the gas to render Goliath unconscious and take him prisoner. Goliath was only rejuvenated thanks to magnetic disk that was used by Thailog to short out Xanatos's armor. ("Double Jeopardy")
A little more than two weeks later, Goliath, Elisa, Hudson, and Bronx were captured by the newly upgraded Pack and were kept in a glass chamber filled with a colored gas that kept them unconscious. It is unknown whether or not this is the same gas, although Goliath, Elisa, and Hudson appeared to be fine upon being freed rather than weak and helpless. ("Upgrade")
