Any novel where protagonist's cheat is time travel? instead of time traveling because of plot device (somehow sent into the past), the protagonist can invoke the time travel process himself and change the history (something like radiant historia, maybe?).
I believe the MC sends himself back in time after being backstabbed (within the prologue or first chapter). Thought its only the once from what I recall of it Revolution of the 8th Class Mage
well, he can do it again if he wants to, he'll have to get back up to his former strength to cast it again tho.