Fire Emblem Heroes is available on Apple iOS and Android devices.
Once per New Hero summoning event, as long as you’ve summoned 40 Heroes from the banner, you are guaranteed one of the four Focus Heroes via a free five-star summon.
The first time this feature will be available will be with the next New Hero event.
The next New Heroes will be Rinkah, Lilith, Midori, and Forrest from Fire Emblem Fates.