From Age of Sigmar - Lexicanum
After the opening of the Stormvaults, they entered the Caverns of Abyssal Silence in the Realm of Ulgu via the Gate of Blind Silence realmgate to recover Ur-gold stolen in the Age of Chaos by Daughters of Khaine.
|The time of the Pyrecrusades is coming. The change-flame hordes will hurl themselves against us. Ulgu has its lodges, will they not march?
~ Ashakar. 
- 1: White Dwarf Vol 3 No 33 May 2019