*Sarcasm* Wait you are running out of memory space like in Aladin? Stop teasing and release new version... If I were a string I'm already turned into wire from the suspense.
Depending on what this shadow enemy does and how is implemented into the story it may be better than souls-like boss, that I'm still not sure how I felt like about in this style of game. But that is also based on not knowing how that boss was tied into story...
An enemy that actually follows you throughout the level? Now that's an innovative type of enemy and makes it more intense. You've outdone yourself Lags!