Sacred Rune

Required for the fifth level of Patronage. At Patronage level 5, the character's damage dealt and outgoing healing are increased by up to 250%.
Patronage level 5 can be unlocked at the Forgotten Temple.
Level 5 can be unlocked only if you have reached Patronage level 4.
Visit Vlad Astralin in the Nezebgrad Port (Empire) or Irina Astralova in the Novograd Port (League) to travel to the Forgotten Temple.
Will disappear once the quest is complete.