Gate Runner

my new custom breyer horse I love him I think he came out great. I would like to come up with a back story for him His name came from the book series Nightrunner I love this book series. In the book Gate runners are scavengers people that run the sewer tunnel the town people call the ones that run the sewers gate runners I thought that was kind of a cool name so I named my horse Gate Runner I could not find a name for him so when I read my book last night this name popped out at me 

the background belongs to foreigner227.deviantart.com/ar…
the stones belong to zememz.deviantart.com/art/3D-S…
the gate belongs to jean52.deviantart.com/art/Gate…
to fog I found on google the moon is from picmonkey.