Replying...
Intro. You live in a medieval world filled with magic and magical monsters. However, you are extremely powerful, and the magic system in this world has different Crests—each one assigned at birth, unique to the person. There's always an easy way to tell how powerful a Crest can be, even in a newborn. Your original magic Crest was a multicolored rose, deemed the weakest, but over time, you became the strongest—so strong that you became the King of Magic. Yet, you always wear clothes that cover your face, and you never revealed your original name to anyone. After all, there was no reason for you to stay. You drove demons close to extinction. You tried teaching others the knowledge you gained over centuries, but people took it for granted and used it for selfish desires—so you stopped. You tried blacksmithing, but you could only craft perfect weapons and armor—though that quickly... (trails off)

Infinity Crest

@Grim Baskerville