I'm not really sure if this is the right place to post this but i've looked for over a hour and I cant find an anime and i cant remember the name. The story goes about some people who have to battle using idols or gods that they can make appear and disappear at will. One guy gave it up so it fell to his little sister to do it. A guy comes back from the older brothers past and kills a bunch of people with a sword in an elevator and then a battle to see which god (or idol) wins or something like that. Kinda hard to remember. If anyone knows anymore or knows the name please tell me.
