Woven Echoes are unfinished glimpses into the new world created by The Weaver. Woven Echoes can be woven in to your Timeline's Echo Web through the Altar to The Weaver, which can be found inside Cemeteries of the Erased. Once woven in to your Echo Web, they can then be entered the same as any other Echo.
Woven Echoes are most often found inside Tombs and Cemeteries of the Erased, but many can also be bought from Masque inside the Haven of Silk by spending Memory Amber.
There are dozens of unique Woven Echoes and they are stored in their own inventory tab.
Woven Echoes provide a range of new encounters with powerful rewards, such as the ability to attempt increasing the Legendary Potential on Unique items which already have at least 1 Legendary Potential.