Memories of Nyx
From Dawn of Corruption Wiki
In-Game Description
Distant visions of pure Corruption echo within your soul.
How to Unlock
After choosing to unleash Nyx in Apothus' realm, continue to Feed the Chosen three times (this requires 9500 essence in total). During the next events choose to intervene and align with Nyx. Once reborn this ability will be given to your character.