The Cruel Aegis is one of the ten Artifacts in WRATH: Aeon of Ruin.
The Cruel Aegis grants temporary invincibility in exchange of major damage to Outlander's health. Upon activation, the health goes down to 10 points, but simultaneously Outlander becomes imprevious to all damage - for fifteen seconds. The health is not recovered after the invulnerability effect ends, thus the Cruel Aegis is intended to be used as a last resort against overwhelming enemy presence.
- E3 2019 Gamespot Stage interview: https://www.youtube.com/watch?v=f7-RDxXGI1o