Okay, I do apologize, I feel this was misunderstood communication.
My first criticism was directed at generic game mechanics from ESO and scraps of barely any lore from TES which associated Shadow magic with altering time and nonesuch, which I was then told one of you guys was also unaware they already existed and DID have unique and fleshed out ideas for it. So that one doesn't even apply to you if you have already done stuff to make it your own
The next was the bit about this guy being able to take out the dragonborn, and the power level of the RP in general. That was more of a suggestion than criticism, as I am a nutcase when it comes to detail, and even though you're going to get the artifacts eventually, this guy is going to be powerful, his influence is going to be powerful, and his minions are going to be powerful. One doesn't take out a being that can knock down walls, slow time itself, and control the weather, and in general possessing all the powers of a minor-god dragon, without being VERY powerful. The Dragonborn is the most powerful person to set foot in Tamriel in over 200 years. I was just making sure you guys were aware of this for the sake of the story making sense, as I've seen the dragonborn killed of A LOT in RPs, usually easily, to show off how powerful some new threat is. Canonically, the dragonborn is much more powerful than some of the limitations on game mechanics (though obviously the exploits/glitches are not even considered). You even go into Sovengarde and duke it out with the minor god guarding the bridge!