Scroll of Altdorf
From RoR Wiki
No longer available as Skaventide event has finished
You can get this item by starting a quest chain from Captain Hans Boschmar in High Pass Empire Warcamp.
First quest is :
Orders from Emperor Karl Franz then you follow the next
Raising The Empire Banner
Relentless Siege
To the Palace
and finally the last one rewards you the Scroll.
Reward of Phoenix King Finubar