Scroll of the Inevitable City
From RoR Wiki
No longer available as Skaventide event has ended
You can get this item by starting a quest chain from Arnorr Seven-Struck in Talabecland Chaos Warcamp.
First quest is :
As Lord Tchar'zanek Demands then you follow the next
Raise the Chaos Banner for Glory
Ravage the Lords of Order!
Go to the Citadel
and finally the last one rewards you the Scroll.
Malekith's Reward