I have a hunch that valer keep going back in time because I think his immortal or powerful...

I have a hunch that valer keep going back in time because I think his immortal or powerful enough to do it. But since he keep going back in time to save arel, he end up getting weak and end up forgetting the memories for using too much power.

Just a guess, since there was a panel where there's a lot of dead arel on the ground