Wave Echo Vault, also termed Echo's Eye Vault or the Vault of Light, is a Vault of Ahm in the lake of Echo's Eye, near Rarte-heim. It was one of the first Vaults to be opened in centuries, at the hands of O.P.E.R.A..

Contained within it was a petrified Beast of Light, around whose neck was found Protophylarch, as well as a portal to the Plane of Light. After the opening of the Empty Wall Vault, the Beast of Light was inert, refusing to attack — until O.P.E.R.A. returned. It attempted to attack and destroy Protophylarch, but by the Beast's defeat, Protophylarch's humanoid form was restored.

It also contained within it a strange wooden shard…