Memories of the Minotaur
From Dawn of Corruption Wiki
Tiadane has ascended. All shall bear witness to your loyal servant.
How to Unlock
Bring the power of Nyx to the minotaur.
In Apothus' hideout, talk to the Minotaur. If he isn't naked and with an aura around him, go explore the hideout or the Barrens. Once he's naked and with an aura around him, you'll be able to have sex with him. Do so. After that, go to Apothus' Realm and feed the Chosen, but instead of trying to help them, choose the new option to align with the Minotaur.
Max HP + 15
XP Multiplier + 0.5
Essence Gain Multiplier + 0.2
Obtaining this achievement/ending allows you to learn the real name of the Minotaur, Tiadane, which is necessary for the Achievement [Safe Passage].