Cradle of Eternity (CoE), also called Garden of Knowledge, is a group instance for players of level 66 and above. Introduced in 5.1, it is accessible from the Reflection of Eternity pillar within the Tower of Eternity and the Archive of All Knowledge in the Archives of Eternity once the final boss has been defeated. This mysterious ancient sanctuary holds primordial knowledge, bit has been corrupted by a shadowy presence. This is the second instance of the three-part grouping, which begins in the Archives of Eternity.