This is a guide to clearing the Infernal and Lunatic maps for Diamant & Alcryst in Fire Emblem Heroes (FEH). To see strategy for defeating Diamant & Alcryst, enemy information, as well as the best units and party to use, read on!

Diamant and Alcryst Strategy Overview

Enemy Units	Alcryst
Recommended Level	Lv.40
Difficulty	Infernal Lunatic Hard
Conditions	Condition 1: All 4 units must survive. Condition 2: You cannot use Light's Blessing
Dates Active	03/27/2025 - 04/04/2025

Initial Unit Placement

Infernal	Lunatic

Infernal Enemy Information

A Lance Cavalier		HP 68		Atk 59		Spd 34		Def 36		Res 38
		： Unbound Lance+ ：- ： No Quarter					： Atk/Def Solo 4 ： Momentum 3 ： Alarm Atk/Def ：- ：-
B Diamant		HP 66		Atk 66		Spd 40		Def 47		Res 23
		： Fair-Fight Blade ：- ： Bonfire					： Atk/Def Finish 4 ： A/D Spiked Wall ： Endless Tempest ：- ：-
C Alcryst		HP 65		Atk 61		Spd 52		Def 33		Res 27
		： Arcane Darkbow ：- ： Deadeye					： Flash Sparrow ： Get Behind Me! ： Def/Res Smoke 3 ：- ：-
D Blue Cavalier		HP 56		Atk 62		Spd 37		Def 27		Res 49
		： Blárdeer+ ： Draw Back ： Frost Moon					： Fury 3 ： Spd/Def Snag 4 ： Atk/Res Ploy 3 ：- ：-
E Sword Fighter		HP 76		Atk 59		Spd 44		Def 43		Res 31
		： Campaign Blade+ ：- ： Godlike Reflexes					： Atk/Spd Finish 4 ： Mystic Boost 4 ： Drive Def 2 ：- ：-
F Axe Knight		HP 81		Atk 65		Spd 23		Def 60		Res 31
		： Defier's Axe ：- ： Armored Beacon					： Distant Reversal ： Slick Fighter 4 ： D/R Far Save 3 ：- ：-

Lunatic Enemy Information

A Lance Cavalier		HP 49		Atk 48		Spd 24		Def 28		Res 30
		： Unbound Lance+ ：- ： No Quarter					： Atk/Def Solo 3 ： Momentum 3 ： Rouse Atk/Def 3 ：- ：-
B Diamant		HP 57		Atk 62		Spd 36		Def 43		Res 21
		： Fair-Fight Blade ：- ： Bonfire					： Atk/Def Finish 4 ： A/D Spiked Wall ： Endless Tempest ：- ：-
C Alcryst		HP 56		Atk 57		Spd 48		Def 30		Res 24
		： Arcane Darkbow ：- ： Deadeye					： Flash Sparrow ： Get Behind Me! ： Def/Res Smoke 3 ：- ：-
D Blue Cavalier		HP 39		Atk 50		Spd 28		Def 20		Res 37
		： Blárdeer+ ： Draw Back ： Frost Moon					： Fury 3 ： Spd/Def Snag 3 ： Res Ploy 3 ：- ：-
E Axe Knight		HP 66		Atk 54		Spd 16		Def 43		Res 19
		： Defier's Axe ：- ： Armored Beacon					： Distant Counter ： Slick Fighter 3 ： D/R Far Save 3 ：- ：-

Damage Calculator Tool

Diamant and Alcryst Strategy

Use a Hit and Run Strategy!

This map has no reinforcements and no refresher foes, making a Hit and Run strategy viable. The map's layout makes this strategy very easy; with the Axe Knight in range immediately and the two choke points on the sides to funnel the enemy units into. Bring 2-3 offensive units and 1-2 refresher units to easily clear this map.

The enemies will not move until you either attack them, or step into the danger area.

On turn one, use a ranged unit to defeat the Axe Knight, then step as far away from the two choke points as possible.

The enemies will march forward, but due to the distance, will be unable to reach your units.

Simply pick them off one at a time, taking care to remain outside the threat range of the remaining enemies.

Alternatively, Use a Tanking Strategy!

You can also adopt a tanking strategy to clear this map, as none of the enemies in this map are too threatening except for Alcryst's pre-charged Deadeye.

Even Diamant doesn't pose too much of a threat if you position your units properly and provide adequate support. He's just a bit difficult to take down, but he won't be able to defeat you if everything goes correctly.

Bring one tank unit that can withstand Alcryst's pre-charged Deadeye and counterattack, then place him/her on the choke point on the right, and another tank unit that specializes in soaking physical damage and place him/her on the choke point on the left. Place support units near them (but out of range of the enemies) and simply click End Turn.

The enemies will engage but be defeated by your tank units if they have sufficient investment and/or support.

A good unit to use on this map is the free Attuned Hector that players received from the A Hero Rises 2025 Voting Gauntlet victory. He can retaliate at any range, is incredibly bulky with his base kit and 【Divine Vein (Stone)】 terrain, and even has a 【Bulwark】 effect to protect the support units behind him. His weakness (Sweep effects) is nowhere to be found on this map, making him ideal for clearing the enemies easily.

Simply park Attuned Hector on the right choke point and let him defeat the enemies on Enemy Phase.

Best Units for Diamant and Alcryst

Player Phase Units

Unit Name
Emblem Sigurd	Lance Cavalry Holy-War Spear grants Emblem Sigurd +2 movement (5 total), 【Canto (3)】, and bonus true damage. Override is an area-of-effect Special that grants an extra action after use.
Brave Felix	Sword Infantry New Levin Sword accelerates Special by 2, opening up either area-of-effect spam or quick Galeforce. Lone Wolf can grant up to three actions in one turn.
Winter Edelgard	Lance Armored Black Yule Lance creates 【Divine Vein (Flame)】 tiles, grants Special cooldown charges pre-combat, and cuts the effectiveness of enemy damage reduction skills. Raging Tempest grants mobility and one additional action after combat. Inheriting Galeforce can grant a third action per turn.
Summer Edelgard	Sword Armored Regal Sunshade's brave effect can quickly eliminate enemies. Raging Storm can grant one additional action after combat. Inheriting Galeforce can grant a third action per turn.
Bridal Sharena	Lance Cavalry Incredibly mobile with United Bouquet granting movement+1 and Forever Yours granting 【Canto (Dist, +1; Max 4)】. Both Forever Yours and Duo Skill generate additional actions while refreshing Canto.
Summer Gullveig	Red Tome Cavalry Can act up to four times in one turn with Golden Sunlight, Time and Light, and her Duo Skill. Flared Sparrow leaves behind 【Divine Vein (Flame)】 terrain, softening up enemies for future engagements.
Ninja Lucina	Colorless Bow Cavalry Great nuking power with Ylisse Ninja Bow dealing up to +25 true damage. Future Focus is a Swap that also grants 【Future Witness】 and 【Null Follow-Up】 to multiple allies upon use. Duo Skill grants another action post-combat and refreshes Canto.
Ninja Sanaki	Red Tome Cavalry Great nuking power with Radiant Scrolls. Flared Mirror creates Divine Veins that hinder movement for enemy ranged units and deal pre-combat damage to foes when they enter combat. Duo Skill grants another action post-combat.
Ninja Corrin (F)	Green Tome Cavalry Ninjutsu Scrolls' brave effect can quickly defeat enemies. Duo Skill grants herself an additional action.
Fallen Chrom	Sword Cavalry Arcane Devourer grants bonus Special charges and Special cooldown acceleration, allowing an easy Galeforce trigger. Fate Unchanged... allows repositioning an ally to safety and using the extra action for Fallen Chrom to retreat to safety himself.
Brave Chrom	Lance Cavalry Geirdriful grants bonus Special charges and Special cooldown acceleration, allowing an easy Galeforce trigger. A Fate Changed! allows repositioning an ally to safety and using the extra action for Brave Chrom to retreat to safety himself.
Gullveig	Colorless Tome Cavalry Quietus Gullveig and Time is Light grant herself additional actions after combat. Flared Sparrow leaves behind 【Divine Vein (Flame)】 terrain, softening up enemies for future engagements.
Reginn	Sword Cavalry Lyngheiðr grants Canto for mobility. Seiðr Shell+ is pre-charged and can defeat an enemy quickly.

Tank Units

Unit Name
Emblem Ike	Sword Infantry Emblem Ragnell neutralizes multiple penalties that affect his combat. Laguz Friend 4 provides strong damage reduction. Great Aether provides extra damage reduction and sustain to keep him healthy throughout multiple combats.
Ice Tribe Fjorm	Lance Armored Ice-Crystal Spear provides multiple defensive effects and a Null C-Disrupt effect. Dual Ice Mirrors and Shield Fighter work together to heavily mitigate damage from multiple ranged attacks and then reflect the damage back onto the enemy.
Attuned Hector	Sword Armored Fellowship Blade grants 【Bulwark】 to protect allies and grants Hector bonus true damage and true damage reduction. Oath of Ostia applies 【Divine Vein (Stone)】 and grants Hector Special skipping and damage reduction piercing. D Counter Echo allows counterattacks against ranged foes.
Brave Corrin (F)	Colorless Breath Armored Multiple damage reduction effects and the 【Divine Vein (Stone)】 effect paired with high Spd allow her to survive multiple engagements.
Marni	Axe Armored A free-to-play unit available using Heroic Grails with a statline heavily focused on tanking. Praise-Piner Axe neutralizes foe's bonuses, grants damage reduction, and has post-combat healing to loop her built-in Miracle effect over and over again.
Brave Edelgard	Axe Armored High mobility for an armored unit. Incredibly sturdy with refined Flower Hauteclere and Black Eagle Rule granting multiple defensive effects.

Support Units

Unit Name
Elimine	Staff Flying Grants damage reduction, healing, and can shut down "At start of turn" effects of foes in cardinal directions upon winning a Res check.
Halloween Flayn	Staff Cavalry Kitty-Cat Parasol grants Special cooldown charges, 30% damage reduction, and "neutralizes foe's bonuses to Atk" to nearby allies and can double as an offensive unit with high Atk and a guaranteed follow-up attack.
Seteth	Lance Flying Refined Spear of Assal grants Seteth and nearby allies bonus stats, true damage, true damage reduction, and neutralizes foe's bonuses.
Summer Hilda	Staff Flying Grants Atk+6 and Special acceleration to nearby allies during combat.

Refresher Units

Unit Name
New Year Peony	Green Tome Flying Grants additional Atk to allies in similar cardinal directions. Can use her Duo Skill to grant another action to an adjacent ally.
Peony	Blue Tome Flying Grants additional Atk and Spd to allies in similar cardinal directions.
Legendary Azura	Blue Tome Flying Grants additional bonuses equal to highest bonus on unit and +1 movement.
Hatari Azura	Green Tome Cavalry Grants +6 to all stats and +1 movement to target unit and all adjacent allies. Can use Harmonized Skill to grant extra actions to allies.

List of All Dancers | Heroes with Refresher Skills

User Submitted Units / Parties for Diamant and Alcryst

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