[quote=MangaArtist15]
M'kay. Makes sense.How would using it tire him out?Also, how is he going to fight during the day? Since he can't use it as well, why not give him a weapon of sorts? Again, just my opinion.
[/quote]

he is still running just at faster speeds if he say ran a mile he would be tired while the shadows increase his speed he is still moving so he wears himself out eventually 

plus he fights tooth and claw he might get a weapon later but atm cause of his amnesia he has no clue how to wield one