Aether Raids Guide | Fire Emblem Heroes (FEH)

Aether Raids Guide Top Banner.png

A guide to Aether Raids, one of the modes of play in Fire Emblem Heroes (FEH). This guide will show you how to play Aether Raids, recommended structures, the best Aether Raids characters, and how to build your Aether Raid defence!

How to Play Aether Raids

Defeat enemy units in 7 turns

Aether Raids Win.png

To win in Aether Raids, you must take out all enemy units within 7 turns. This is unlike the Arena wherein there is no turn-limit. This makes Aether Raids more fast-paced and strategic than the other competitive game modes.

Enemies do not move unless your units are in range of them

Enemy units in Aether Raids are AI-controlled and they will not move unless they are attacked or one of your units end the phase while in the range of the enemy danger zone. This encourages offensive strategies, which are very fit for the context of the game mode.

Destroy Aether structures

It is not a clear requirement to destroy the opponents' Aether structures in a raid, but doing so will help recover some of the Aether raiding costs. Doing so consistently will allow you more raids in a season. This gives you the best opportunity to climb through the tiers in Aether Raids.

You must destroy the Aether structures before wiping out the entire enemy team as taking out the final enemy unit will end the raid immediately.

Aim for a high score

  • Integrate one ore more bonus heroes into your Raiding party.
  • Have all your units survive
  • Integrate a Mythic hero into your raiding party ,and have units that are blessed in said hero's attribute.

Your score or lift after an Aether Raid decreases -20 per each ally that is taken out. It is increased whenever you integrate a bonus unit or an in-season Mythic hero that is accompanied by blessed allies.

Take note that appropriately blessed units and bonus units are granted with bonus stats that keep them from dying and help you achieve victory. Try your best to always integrate them into the mix so to give yourself the best chances for winning.

Defend your Aether Keep

Defend your Aether Keep!.png

Take out all enemies or survive for 7 turns!

In Aether Raids defense, your units will be controlled by AI. Your Aether Raids defense team will win if they are able to take out all raiding units or if at least 1 survives after the 7th turn.

Make use of defensive Mythic heroes

Dark and Anima Mythic heroes are considered to be defensive heroes. They reduce your lift gain when they are used in offensive Aether Raids, but they mitigate the amount of lift lost if they are used in defensive Aether Raids. Since most of these heroes are strong heroes anyway, we highly recommend using them in your defense maps. Take note that your Mythic hero must be under the appropriate season to be able to migitate the lift loss.

• Number of Mythic Heroes (max. 2) × number of allies with blessings × 5 • Number of merges × 1 (max. 20)

Auto-Dispatch Usefulness.png

Auto-Dispatch Notes.png

In July 2020, Auto-Dispatch for Aether Raids was released. This enables players to send out raiding parties to automatically battle for some lift. Enemy units encountered in Aether Raids are not player-owned and are much weaker than those encountered in normal offensive Aether Raids. It can be used 3 times per season and the characters dispatched can still be used in normal offensive Aether Raids so we highly recommend that you use this feature.

Other notes for Auto-Dispatch

  • It takes 20 hours until Auto-Dispatch rewards are available.
  • Lift acquired will only be 75% of the normal reward amount.
  • No Aether structures are available in raids so you can not gain Aether back.
  • Effects of Escape Ladder is not available upon defeat.
  • The Defense Fortress will be the same level
  • Wins here do not count as Aether Raid wins in quests.

Although Auto-Dispatch is a very convenient function, it takes time for your units to reward you with lift and it is not cost-efficient in terms of Aether to lift ratio. Additionally, you also can not recover lift as Aether stuctures are not available in Auto-Dispatch.

Make use of Mythical Heroes

Effect Atk Icon
Atk+3
Spd Icon
Spd+4
Def Icon
Def+5
Res Icon Res+5
Light Icon Peony - Sweet Dream Image Mila - Goddess of Love Image Eir - Merciful Death Image
Astra Icon Altina - Dawn Plumeria - Lewd Dream Image Naga - Dragon Divinity Image
Dark Icon Bramimond - The Enigma Image Yune - Chaos Goddess Image Hel - Death Sovereign Image Sothis - Girl on the Throne Image
Anima Icon Duma - God of Strength Image Líf - Lethal Swordsman Image Thrasir - Omnicidal Witch Image Mirabilis - Daydream Image

Light and Astra heroes are considered as offensive Mythic heroes that increase your lift upon winning an offensive Aether Raid. Dark and Anima heroes on the other hand are considered defensive heroes that decreases the lift loss upon failing to defend against an Aether Raid. The increase and decrease in lift can be increased by merging the Mythic hero responsible and by deploying them into battle with heroes that are blessed with the appropriate blessing.

Because of these, we strongly recommend you to aim for Mythic heroes to help you gain and preserve lift!

Spread your firepower throughout the many seasons

Raiding Parties.png

You can have up to 5 raiding teams when raiding in Aether Raids. Because of the many seasons, there will be many different line-ups used by other players depending on the season. We recommend having a diverse line-up of teams that can cover many different match-ups under a specific season.

You can re-use units in many different teams. What we mean by spread your firepower is that you should use your resources to make sure that you are strong in all seasons!

Aether Raids Structures

Structures can be built and upgraded

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The structures that give you advantage in Aether Raids can be created using Aether Stones. By creating and improving structures, you are able to increase your efficiency and make room for more strategy in both sides of an Aether Raids. Making use of Aether Stones also grant you with Heavenly Dew that is used to upgrade said structures.

Aether Stones are awarded through playing Aether Raids. This encourages you to play Aether Raids consistently to grow stronger in this game mode!

Offensive and defensive structures

Aether Raids Structures.png

Defensive structures take up the majority of the screenshot. They are within the aquamarine outline. The offensive structures are at the bottom of the screen inside the orange outline.

There are two kinds of structure in Aether Raids, offensive and defensive structures. Your defensive structures are present in your Aether Raids defense map and their presence and effects will help you in defending your Aether structures and heroes. Offensive structures on the other hand are present with you during Aether Raids offense and have effects that will help you take down the enemy team. They have tiers and they can be improved by using Heavenly Dew on them. Improving these structures will strengthen their effects making it easy for you to defend or raid Aether Keeps.

Best structures to prioritize upgrades on

Fountain 2.png Fountain 1.png

The Aether Fountain and the Aether Amphorae are structures that increase the amount of Aether you can store and the amount of Aether you restore per day. This means that having them upgraded means that you can partake in more Aether Raids per day! This is the reaon why we strongly recommend you upgrade these two structures first.

Fortress 2.png Fortress 1.png

If the level of your Fortress (O) is higher than the level of your opponents' Fortress (D), then you will gain a stat bonus to all of your allies. This is a huge boost to your team or to the enemy team so we recommend upgrading your fortresses right after maxing out your Aether structures!

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Bonus structures change every other season. If they are present in your side of the field, then they will grant your fortress an extra level. If both Aether structures and both fortresses are at max level and you do not have the current bonus structure, we strongly recommend you building one for the season!

Military Room 2.png Military Room 1.png

Tactics Room limits one kind of unit movement to 1 space for an action if they are of a certain HP percentage. It is useful in both sides of the battlefield. This is a low priority upgrade, but if you have the Aether structures and the fortresses fully upgraded and you also have the bonus structure for the season, you shoul definitely upgrade your Tactics Room structures.

Increase Lift by Using Mythic Heroes!

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Light and Astra: Increase Lift Gain

Increased Lift Gain Formula
Number of Mythic Heroes × number of allies with blessings × 10 + Number of merges × 1

If the Mythic hero and blessed allies successfuly win an offensive Aether Raid, the lift gained will be increased by the value above.

Dark and Anima: Decrease Lift Loss

Decreased Lift Loss Formula
Number of Mythic Heroes (max. 2) × number of allies with blessings × 5 + Number of merges × 1 (max. 20)

If the Mythic hero and blessed allies fail to defend the Aether Keep, the lift loss will be decreased by the value above.

Stat Bonus for Blessed Allies

Mythic heroes grant their blessed allies stat bonuses depending on their Mythic element. The stat bonuses can be seen in a table in this section under Make use of Mythical Heroes.

Best Aether Raids Units

Ranged cavalry units

Reinhardt Icon Reinhardt Legendary Leif Icon Legendary Leif Veronica Icon Veronica Brave Lyn Icon Brave Lyn

Ranged cavalry units are very effective in Aether Raids as their high mobility and range allow them to jump from target to target taking them out in lesser number of turns compared to what infantry melee units can accomplish. If you are running a cavalry-heavy raiding team, be sure to include skills such as Hone Cavalry. Though be wary of skills like Panic Ploy if you will be using such buffs!

High-powered offensive tome units

Aversa Icon Aversa Ophelia Icon Ophelia Legendary Celica Icon Legendary Celica Bramimond Icon Bramimond

Being ranged also allows you to attack past the many buildings that are present in Aether Raids. In some situations, you may be able to take out whole teams without them retaliating too much. This is why high-powered offensive units like the ones above are very effective as well. Aversa deserves a special mention because she possesses debuffs that affect enemy units that are adjacent to each other. She is a very common unit in Aether Raids.

Refresher-assist units

Legendary Azura Icon Legendary Azura Peony Icon Peony Reyson Icon Reyson New Year Azura Icon New Year Azura

Since the turns are limited, you may need your stronger units to take two actions per turn and dancers can allow them to do so. In Aether Raids, we recommend flying refresher-assist units over grounded ones as there are terrain such as lava lakes, bodies of water and mountains that hinder ground dancers' mobility.

List of Heroes with Refresher Skills

Aether Raids Defense Guide

Protect your Aether structures

It is a good idea to prioritize protecting your Aether structures. This is because players will be actively seeking these structures to destroy them as it restores Aether for them. When they have breached your defenses, and your Aether structures are still up, they will be actively trying to juggle keeping their units alive, taking out your units and taking out these Aether structures. Odds are, they will fail at least one of these.

Utilize your Fortress (D) properly

Fortress (D) is the only structure that can not be destroyed by enemy units. Flying units can not pass through it as well. It works well with some of the impassable terrain already in Aether Raids maps. Be creative in taking advantage of this structure to funnel your enemies right into your line of fire!

Run trial-and-error raids on your defense map

Under the Aether Keep interface, tap on Help & Extras to Test Defenses. This will allow you to run practice raids on your Aether Keep. Through this process, you will be able to know what the weaknesses of your Aether Keep are. Additionally we also recommend that you watch the raids from other players that are done against your Aether Keep. You will know how other minds go through your defenses and through that, you might be able to make changes that will better your defenses.

You can also run practice raids on your friends' maps under Friend Mock Battle! Use this to practice your raiding skills.

Defense map examples

Example 1: a defense that prioritizes defending Aether structures using cavalry units and a flying refresher-assist

Defense 1.jpg

This defense team consists of heroes that are ranged cavalry units like those mentioned above. The main damage dealers in this team are Reinhardt and Brave Lyn. They are aided by a healer and a refresher-assist ally.

By placing the Aether structures at the top-right corner, the enemy is forced to go through your high-ranged high-firepowered units to get to said structures.

Traps are also placed in the middle as the indestructible Fortress (D) in the right side of the map coupled with the lake 2 spaces of it prevents all but flying units to go through that route. Going through the left side would take more time and the Bolt Tower coupled with the traps will funnel them right into the range of your units. This encourages your enemies to go through the main funnel and take maximum punishment from your traps, Bolt Tower and defense units.

Example 2: a defense that makes good use of a map-wide debuff by keeping the source unit safe

Defense 2.jpg

This map makes good use of Aversa's map-wide debuff by keeping her safe at the top-right corner of the map. There, she is kept safe by some structures, terrain and the Fortress (D). If you were to go for her passing through the trees, you will be in range of attack not only from Aversa herself, but from her allies as well. A Tactics Room is also in that side to prevent enemy movement under some situations.

Going through the left side of the map would not be easy as well. Traps, the Panic Manor (O) and 3 defense units would give a more than warm welcome to the unlucky raiders. Trying to bait out Robin or Veronica would require some luck and strategy as well because of the trap tiles that are conveniently placed in front of them. They can take another action as Ninian would conveniently dance them into taking another attack against the raiding team.

Some other good map-wide debuffers to use are Soren who has Chill Atk 3 built-in into his weapon, meaning he can equip 2 other chill skills on top of that and Gunnthrá who has Res Ploy 3 and the very powerful Chilling Seal.

Example 3: a formation that punishes raiders for attacking defense units through overlapping attack ranges

Defense 3.jpg

This is a very straightforward strategy that makes use of structures and the general terrain of the map to funnel raiders either into the trap-filled center. At first glance, they may be able to take the right side straight into the Aether structures but because of an impassable terrain native to the map and the Fortress (D), they cannot take that easy route.

The easy target here is Ophelia, but she is very protected by trap tiles. If they are able to take out Ophelia, the other units are just in range for an intense skirmish in the middle of the map. They are aided by structures that funnel their movement and inflict debuffs on the enemy so the raiders are always at a disadvantage.

Aether Raids General Information

What is Aether Raids?

Aether Raids PNG Feh Channel.png

Aether Raids is a competitive game mode like the Arena that features not only player-owned units, but player-owned maps as well. To progress in this new game mode, players are encouraged to power-up not only their units, but their structure and defense strategy as well. Unlike the Arena, Aether Raids has a turn-limit of 7 turns that makes it more fast pace and require more strategy from players. It can be said that the nature of the game mode and the tier system make Aether Raids one of the most competitive and challenging game modes in the game.

Aether Raids Rewards

Heroic Grails PNG.png

Rewards in Aether Raids include dragonflowers, Heroic Grails and Aether Stones that allow you to power-up not only your units, but your structures in your Aether Keep as well. Heroic Grails are used to summon heroes that you can use outside of the Aether Raids game mode. This makes this game mode a must-play if you want to progress efficiently in the game.

Rewards are dependent on your rank

Aether Raids Rewards.png

The amount of rewards you get is dependent on your AR Tier! Progress through the AR Tiers to consistently get huge amounts of resources in the long run!

Aether is required to run raids

Aether Requirement.png

Aether is required to run raids! To increase the amount of Aether you get every day, you need to upgrade your Aether structures with Aether stones. At the end of every season, all of your Aether is replenished.

No rating system similar to Arena

Scoring is much simpler and is not dependent on a unit's overall power like the system used in the Arena. This means that you are more free to use your favorite units and bonus characters without penalty!

Aether Raids Related Links

Useful Links

Useful Information

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Basic Information on Hero Building

Building Your Heroes
Level Grinding | How to Level Up Fast How to Gain SP Quickly
How to Use Inherit Skill Merge Allies Guide
Heroes You Should Unlock Potential For Which Heroes Should You Send Home?
When Should You Unlock Potential? How to Use the Training Tower
Trait Fruits: How to Change IVs How to use Dragonflowers
How to Get Divine Codes ---

Building Specific Roles

Hero Roles
Heroes with Refresher Skills List of Staff Users
Physical Wall Heroes (Tanks) Magic Wall Heroes (Res Tanks)

Beginner Information

Beginner Guides
Five Things to Know Before Starting Reroll Tier List
Hero Building Beginner's Guide
List of All Skills How to Get Free Orbs

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    • >>[185] how are your pulls bro?

    • >>[20]
      Idunn is best built as a sustain omni-tank. Sol or Aether are both good options (I would personally prefer Sol). Atk Smoke 3 and her default B skills are good. You should switch the A skill to at least Distant Ward and ideally Distant Counter. The S Seal should be a Sturdy or Mirror Stance skill, whichever you think would fill the niche better on your team.

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