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Reason: This is a variant mode
Arena Assault (Japanese: 縛鎖の闘技場 Arena of Bonds) is a game mode in Fire Emblem Heroes. Arena Assault allows players to challenge extremely difficult teams in arena-style combat, thus making it somewhat of a fusion of the mechanics of the Arena and Squad Assault; like in Squad Assault, players cannot use the same character twice during the same session of Arena Assault. Like the Arena, Arena Assault ranks players over the span of a week and gives out rewards based on how a player fares over the course of a week, although a Dueling Sword is not required to play Arena Assault like it is at the Arena.
Should a player earn wins against teams that include characters at level 35 or higher, they will be given an opportunity to pick special items to aid them in future battles in the mode. Players can pick their items after attaining streaks of three, five, and seven qualifying battles. They are as follows:
|Elixir||Fortifying Horn||Special Blade|
|Infantry Boots||Naga's Tear||Dancer's Veil|
|Lightning Charm||Panic Charm||Fear Charm|
- The introduction of the Arena Assault's slate of items marked the first time an item that had previously appeared in the main Fire Emblem series made an appearance in Heroes, specifically the Elixir and Naga's Tear.