How old do I have to be to use a Nintendo Account with Fire Emblem Heroes? You must be at least 13+ to use this game with a Nintendo Account. Related articles [iOS]What operating systems support this application? What kind of application is Fire Emblem Heroes? Can I play Fire Emblem Heroes offline? What languages are supported? I did not get a free 5★ summon after summoning 40 times on a summoning event.