When put on set of 3 red runes (Foundation of Ruin, Firmament of Fire, Ascencion of Destruction), set effect is called Empyral Aniquilacion you are supposed to get a proc that adds fire damage to professional abilities. However in heroic and raid instances it seems to be bugged - it somehow interacts with Chaotic Leech passive debuff which is present in zone, and if you die you cannot revive - once revived, be it with resurrect or at revive point - you get insta killed TWICE. It continues 5 times till your gear is at 0%, then proc stops working and you can stand up and repair gear. Parse showing that Chaotic leech killed you. When i take off item with rune or rune from an item i can revive normally.