Fire Emblem Heroes announced that Zephiel, The Liberator is returning for a Grand Hero Battle Rebout with a new Infernal difficulty.
There are also a new set of quests alongside the battle, which require a different copy of Zephiel to be used to clear the Grand Hero Battle, as well a quest that requires Alfonse to deal the final blow to Zephiel.
King Zephiel was the main antagonist of Fire Emblem: The Binding Blade, which was the game Roy starred in as the main character. He also was a minor character in Fire Emblem: The Blazing Blade, which was the prequel.
Fire Emblem Heroes is available on iOS and Android.