Oun-mAa Niye Ressoot is an Isu vault located in the Isolated Desert in Egypt. It is connected to the tomb of Ahmose-ankh, an ancient Egyptian crown prince who had his final resting place built on top of the complex's remains.
Around 48 BCE, the vault was visited by the Medjay Bayek of Siwa, who activated the vault's pedestal and witnessed a recording made by the Amun Amunet messenger. Dated ninety-one days after the Great Catastrophe, the message displayed was intended for Layla Hassan, who was reliving Bayek's genetic memories in 2017.
- Oun-mAa Niye Ressoot is a romanised version of the Egyptian "(wn-mAa) (ny) (rswt)", roughly meaning, "Reality of dreams".