This is a guide to the Merge Allies feature in Fire Emblem Heroes (FEH). Read on to learn the effects and benefits of Merging duplicate Heroes in the Ally Growth Menu, and the best timing for merging a unit.
List of Contents
By merging Heroes with the same rarity, at least 2 to 5 stats will be given a +1 enhancement. Merging can be done up to 10 times, where all stat values will be greatly increased.
You can check the Before - After screen just before pressing the Merge button.
|Stats||No Merge||5 Merges||10 Merges|
Enhanced stats post-Merging will be in the order of the Hero's highest initial IV. Even for duplicate Heroes, the order in which a stat is enhanced after Merging will increase depends on the difference between the two.
The priority is Atk > Spd > Def > Res.
If a Hero has flawed stats, they can receive a +3 or +4 enhancement after the first Merge, and two +1 enhancements for other stats.
This only applies for the first Merge, while succeeding Merges will only increase two types of stats by 1.
In case a character has no flawed stats, the enhancement order upon Merging is:
Merging Allies also grants additional SP for learning skills. The amount gained depends on the rarity of the Merged Hero.
If the Hero used as Merging material has a lower rarity than the original, only SP will increase.
Heroes with the same or higher rarity can give both added stats and SP.
Heroes with acquired Skills can also be used as Merging material. These Skills will be inherited by the target Hero once the Merging is complete.
Any unlearned Skills will be passed on to the character in its unlearned state after Merging.
If the Hero used as Merging material has any Skills inherited from other Heroes, these will also be passed on as well.
If you use previously Merged Heroes as material, the stats and any other increases gained will also be passed on to the target Hero to be Merged with.
An additional 120 SP will be gained if the Merging material is a 5-star Hero. Also, if this Merge attempt is beyond the Merge limit, SP will still be added accordingly.
The recommended sequence for using previously Merged Heroes as material is as follows:
Merging Heroes in this manner is an efficient way to learn Skills and gain stats quickly.
Any Merged stat bonuses and added SP will reset to initial values upon using Unlock Potential to raise a Hero's rarity. However, the cost of using Hero Feathers will be reduced by 300 for each Merge.
For example: When using Unlock Potential on a 4-star Hero, the number of required Feathers is reduced to 18,800 instead.
While Merging gives at least a +2 on stats and some SP, multiple Merges can make these benefits stack and increase your overall Area rating. It's recommended to Merge 5-star characters if you frequently play the Arena game mode.
Merging a 4-Star Hero to +10 will give them similar stats to a 5-star Hero at +5. Normally, 4-star Heroes will be weaker than a 5-star, but they become considerably stronger at +10. If you don't have much 5-star Heroes, then it's recommended to Merge as much duplicates as you can.
The main beneifit of Merging is for increased Arena ratings. So players who rarely battle in the Arena may not need to use this function as often. Clearing high difficulty maps with Hero battles requires Level 40 characters, so it's recommended to first focus on getting that unit to level 40, afterwards you can think about whether or not to merge them.
If the player needs to get rid of duplicate Heros to clear space, Merging is a viable option. Using Hero Feathers to Unlock Potential prior to Merging can also give better results if the player can spare the Hero Feathers. Take note that building a Hero to their full potential will come before merging as a rule of thumb, but any boost to a unit's power should be seen as a good thing.
|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||How to Grind Summoner Support|
|How to Increase Ally Support||---|
|Heroes with Refresher Skills||List of Staff Users|
|Physical Wall Heroes (Tanks)||Magic Wall Heroes (Res Tanks)|
|Five Things to Know Before Starting||Reroll Tier List|
|Hero Building||Beginner's Guide|
|List of All Skills||How to Get Free Orbs|
|My Summoner Guide||---|
|Arena Guide||Best Arena Teams|
|Win 5 Battles in Arena With No Deaths||Arena and Aether Raids Seasons|
|Aether Raids Articles|
|Aether Guides||List of Aether Raids Structures|
|Aether Raids Offense Guide||Best Aether Raid Defense Units|
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