It's a great week to be a Fire Emblem Heroes fan -- not only did we get another update with new heroes, the game is also hosting a new Grand Hero Battle, Legion: Masked Maniac Grand Hero Battle. The event features Legion of Fire Emblem: New Mystery of the Emblem fame.
In New Mystery of the Emblem, Legion was an eerie berserker with the ability to clone himself. In Heroes, Legion's weapon turns enemy bonuses into penalties after a fight, which could be pretty useful in a pinch. It's pretty easy to get Legion to fight on your side. As with most Grand Hero Battles, completing the map on hard or lunatic automatically wins you a three or four-star Legion of your very own.
The event starts early A.M. EST, so you'll be able to jump right in on Friday.
Source: Nintendo Everything