Inferno, the Ruby Blade, is a sword which belongs to the House of Zarnagon. It is the twin sword of Smaragdos. The blade's name refers to its red, ruby look. It used to be the sword of Xerathas d'Zarnagon, but it was stolen by the Totenkopfs in 1017 AE. Its wielder can use it to cast and absorb fire spells. Kareth d'Zarnagon absorbed some of the power from Inferno during the Second Battle of Myridia and eventually used that power to give birth to the Godslayer, which led to the Cataclysm. Since then it has fallen into the hands of the Totenkopfs.