[quote=@Caldizar]
So I've been thinking of possibly creating a character who can manipulate time to a certain extent. Course I have a certain way I'd like to try and limit it, possibly only limiting time travel to a couple of hours backward at most and maybe removing the ability to change things, as well as a possibly parasitic entity that gives said time controllers their powers at the cost of their lifeforce/lifespan.
[/quote]

As long as you're comfortable with the notion of other time travelers, I don't see much of a problem.