On the Holy Symbol

Content
Priestess Lanwe, one of the queen-pretender's lackeys, has in her possession a holy symbol that could be disruptive to our plans. Find her, kill her, and take the symbol.

It is the only relic at the site powerful enough to destory the corruption stones. They'll be able to cleanse the site eventually, but something will have to be brought in from Torinaan or the Isle itself that will be powerful enough to undo this.

--Norion

Appearances
Elder Scrolls Online