Aetherlink

"The system erases your past to secure your future. But what is left of you when you can't remember who you are?"

Felidar wakes up in a strange tower with no possessions other than his name and a mysterious gem fused to his skin. In this place, memories are the currency used to acquire power. As the "System" calibrates his skills to turn him into the perfect weapon, Felidar and a group of strangers must survive mechanical horrors and tempestuous calamities.
Each new ability he masters erases a fragment of his former life. In a race against dehumanization, Felidar must uncover the secrets of the Tower before there is nothing left of the man he once was.