Aether Raids is a game mode in Fire Emblem Heroes which was introduced in version 2.11.0.
Overview[]
The Aether Raids mode shares some similar principles with Arena Duels, where the player's team has to defeat a team built by another player and controlled by AI in an offensive battle to earn scores and increase ranking in exchange for rewards, or build their own team to defend against another team to reduce the deducted scores. However, the major difference in Aether Raids is that teams on both sides have the assistance of structures which can be built and placed on the map to create situations for the battle. A battle is also limited to seven turns for a successful attack or defend.
Structures[]
Offensive[]
| Structure | Image | Description | X & Cost/Level |
|---|---|---|---|
| Infantry School (O) | 
|
At start of turn, inflicts Atk/Spd/Def/Res-X on infantry foes within 3 columns centered on structure through their next actions. |
2 & 50 |
| Armor School (O) | 
|
At start of turn, inflicts Atk/Spd/Def/Res-X on armored foes within 3 columns centered on structure through their next actions. |
2 & 50 |
| Cavalry School (O) | 
|
At start of turn, inflicts Atk/Spd/Def/Res-X on cavalry foes within 3 columns centered on structure through their next actions. |
2 & 50 |
| Flier School (O) | 
|
At start of turn, inflicts Atk/Spd/Def/Res-X on flying foes within 3 columns centered on structure through their next actions. |
2 & 50 |
| Panic Manor (O) | 
|
At start of turn, if any foes are within 7 rows and 3 columns centered on structure and their HP ≤ X, converts bonuses on those foes into penalties through their next actions. |
40 & 100 |
| Tactics Room (O) | 
|
At start of turn, if any foes are within 7 rows and 3 columns centered on structure and their HP ≤ X and they use bow, dagger, magic, or staff, restricts those foes' movement to 1 space through their next actions. |
40 & 100 |
| Bolt Tower (O) | 
|
At the start of turn 3, deals X damage to foes within 7 rows and 3 columns centered on structure. |
10 & 100 |
| Catapult (O) | 
|
At start of turn, destroys defensive structures within the same column as this structure if their level ≤ this structure's level. |
100 |
| Healing Tower (O) | 
|
At start of turn, restores X HP to allies within 5 rows and 5 columns centered on structure. |
10 & 100 |
| Fortress (O) | 
|
If structure's level > opponent's Fortress (D) level, grants Atk/Spd/Def/Res+X to all allies. (X = difference in level × 4). Cannot be removed or destroyed. |
0 |
| Escape Ladder (O) | 
|
A lost battle's Aether cost will be returned. May be used up to X times per season. |
1 & 100 |
|
Bright Shrine (O) |
  |
At start of turn, inflicts Atk/Spd-X on foe on the enemy team with the highest Atk+Spd total through its next action. | 2 & 100 /14 & 300 /2? & 500 /3 |
|
Dark Shrine (O) |
  |
At start of turn, inflicts Def/Res-X on foe on the enemy team with the highest Def+Res total through its next action. | 2 & 100/1 4 & 300 /2? & 500 /3 |
Defensive[]
| Structure | Image | Description | X & Cost/Level |
|---|---|---|---|
| Infantry School (D) |
|
At start of turn, inflicts Atk/Spd/Def/Res-X on infantry foes within 3 columns centered on structure through their next actions. |
2 & 50 |
| Armor School (D) |
|
At start of turn, inflicts Atk/Spd/Def/Res-X on armored foes within 3 columns centered on structure through their next actions. |
2 & 50 |
| Cavalry School (D) |
|
At start of turn, inflicts Atk/Spd/Def/Res-X on cavalry foes within 3 columns centered on structure through their next actions. |
2 & 50 |
| Flier School (D) |
|
At start of turn, inflicts Atk/Spd/Def/Res-X on flying foes within 3 columns centered on structure through their next actions. |
2 & 50 |
| Panic Manor (D) |
|
At start of turn, if any foes are within 7 rows and 3 columns centered on structure and their HP ≤ X, converts bonuses on those foes into penalties through their next actions. |
40 & 100 |
| Tactics Room (D) |
|
At start of turn, if any foes are within 7 rows and 3 columns centered on structure and their HP ≤ X and they use bow, dagger, magic, or staff, restricts those foes' movement to 1 space through their next actions. |
40 & 100 |
| Bolt Tower (D) |
|
At the start of turn 3, deals X damage to foes within 7 rows and 3 columns centered on structure. |
10 & 100 |
| Catapult (D) |
|
At start of turn, destroys offensive structures within the same column as this structure if their level ≤ this structure's level. |
100 |
| Healing Tower (D) |
|
At start of turn, restores X HP to allies within 5 rows and 5 columns centered on structure. |
10 & 100 |
| Fortress (D) |
|
If structure's level > opponent's Fortress (O) level, grants Atk/Spd/Def/Res+X to all allies. (X = difference in level × 4). Cannot be removed or destroyed. |
0 |
|
Bright Shrine (D) |
 |
At start of turn, inflicts Atk/Spd-X on foe on the enemy team with the highest Atk+Spd total through its next action. | 2 & 100/1 4 & 300 /2? & 500 /3 |
|
Dark Shrine (D) |
 |
At start of turn, inflicts Def/Res-X on foe on the enemy team with the highest Def+Res total through its next action. | 2 & 100/1 4 & 300 /2? & 500 /3 |
Traps[]
| Structure | Image | Description | X & Cost/Level |
|---|---|---|---|
| False Bolt Trap | 
|
This looks like a Bolt Trap, but it's just a fake. | 0
|
| False Heavy Trap | 
|
This looks like a Heavy Trap, but it's just a fake. | 0
|
| Bolt Trap |
|
If foe ends movement on this structure's space, deals X damage to target and units within 3 spaces. (Cancels foe's attack or Assist skill.) |
10 & 0 |
| Heavy Trap |
|
If foe ends movement on this structure's space, restricts movement of target and units within 2 spaces with HP ≤ X to 1 space through their next actions. (Cancels foe's attack and Assist skills.) |
40 & 0 |
Resources[]
| Structure | Image | Description | X & Cost/Level |
|---|---|---|---|
| Aether Amphorae | 
|
Stores up to X Aether. If destroyed in an attack, it restores Aether to the raiding party (if they win). Note: Cannot be removed. Can be destroyed. |
100 & 0 |
| Aether Fountain | 
|
Restores X Aether to the Aether Keep each day. If destroyed in an attack, it restores Aether to the raiding party (if they win). Note: Cannot be removed. Can be destroyed. |
50 & 0 |
Ornaments[]
All event ornaments cost 500
.
| Structure | Image | Description |
|---|---|---|
| Anniversary Arch | 
|
An arch built to welcome well-wishers during the second anniversary. It's an event item. |
| Anniversary Cake | 
|
A massive cake baked to celebrate the second anniversary. It's an event item. |
| Bronze Throne | 
|
A throne suitable only for those who have achieved a rank from 1 to 10000 in Aether Raids. |
| Feh Kagami Mochi | 
|
Not the real Feh! It's a decoration that brings good luck for the New Year. It's an event item. |
| Feh Statue | 
|
An objet d'art produced under the direct supervision of its model. It's an event item. |
| Fireplace | 
|
If it's cold where you are, this item should help you feel a little bit warmer. It's an event item. |
| Flower Bed | 
|
An arrangement of flowers in vivid colors. It's an event item. |
| Golden Throne | 
|
A throne suitable only for those who have achieved a rank from 1 to 3000 in Aether Raids. From the second time onward, the number of times this feat has been achieved will be inscribed upon it. |
| Heart Garland | 
|
A decoration that symbolizes overflowing love. It's an event item. |
| Silver Throne | 
|
A throne suitable only for those who have achieved a rank from 1 to 6000 in Aether Raids. |
| Anniversary Arch |
|
An arch built to welcome well-wishers during the second anniversary. It's an event item. |
| Snow Family | 
|
It seems they're brother and sister. It's an event item. |
| Streetlamp | 
|
A lamp in an elegant, classic design. It's an event item. |
Terrains[]
| Springwater | Wintry | Abandoned Castle | Snowdust | Desert |
|---|---|---|---|---|
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 |
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| Spring Breeze | Leafy Canopy | Lost Castle | Bright Grassland | Lava Floes |
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