Published: October 25 2021
Last Updated: December 16 2023
This guide covers the recommended team compositions and strategies to beat Hraesvelgr. The goal is to maximize the acquisition of Wind Source, a rare material exclusively acquired from First Time Stage Clear rewards and World Tree Tower Exchange Shop.
Recommended Artifact Sets:
- No. 19: Hraesvelgr’s Nest (Ideal for Offense)
- Increases allies’ single-target attack damage dealt to enemies by 4% / 8% / 12% / 16% / 20%.
- No. 2 Guardian of Istal (Highly Effective for Defense)
- If an ally is Debuffed from a skill during the enemy’s turn, restores 1% / 2% / 3% / 4% / 5% of their Max HP. (Excludes PVP and Death Match)
Recommended Teams[]
Note: The optimal team isnt needed to beat F1-F3. Most teams using Megellda can beat them.
| F1-F3 | Main | |||
| Optimal Team |  With Holy Relic
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 With Holy Relic
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| One turn team |
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 With Holy Relic
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| F4 | Main | |||
| Optimal Team | /
With Holy Relic |
With Holy Relic
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Floor 1 Strategy
For this floor, there is no real gimmick you need to worry about outside of Phase 4. Within that phase, the boss has increased defenses, making it difficult to do damage. For this reason, you should save your hard hitting skills to deal damage. After a few turns, the boss will instead gain an irremovable Attack Buff (in place of the Defense) and inflict Infect upon your team which restricts Recovery-related stats, and it can not be removed. Ideally, you'll want to kill the boss before this occurs. These two states are pictured below. Also, in Phase 3, the boss can remove Buffs. So, keep that in mind as the boss may target your Amplify unit after removing the Taunt from your tank (unless you are using Red Festival Queen Diane who uses a Stance). However, it isn't the end of the world if that happens as you can easily regain Buffs with Dark Traitor Meliodas.
Besides that, attack the boss like normal while maintaining your Taunt. If you find yourself not gaining any good Attack skills, you can stall on any of the earlier phases to buy yourself some extra time to gain them or a strong Ultimate. If using Blue Megellda, remember to use her Recovery skill to grant Buffs to allies.
Floor 2 Strategy
As stated on the first floor, the first phase has no specific gimmick. It's best to use this time to start building up to your desired skills. Make sure to save a Taunt skill if you do not plan on killing the boss in one turn during Phase 2. This is important as the boss will more than likely kill you with its special attack without a Taunt active, which makes the attack miss. Again, if you have a unit that can bypass the typical damage cap, then you can simply attack and kill the boss in one turn. For example, Blue "The One" Escanor can use his Death Ultimate to hit the cap twice, followed by three attacks from any other unit or those with Abyss such as Green Demon Lord Rimuru Tempest and Blue Festival Cusack (With Ult Move Level 3 or higher) that deals extra damage at the end of your turn. The Revive passive the boss has during Phase 2 is weak, so any attack should kill it post-revival.
In Phase 3, there is a new gimmick to deal with. At certain HP levels, the boss may increase its Attack-related stats, Defense-related stats, or Recovery-related stats. You do not want to attack multiple times unless you are prepared to kill the boss. Thankfully, the boss is not particularly tanky during this phase. The safest way to approach this phase is to hit the damage cap once in a single attack during the first turn which only activates the extra defense, allowing the boss to attack, which can allow those with Power Strike to take advantage of extra resistance to deal more damage, and then wailing on it until it dies on your second turn. Of course, you can just kill it during the first turn if you have the skills to do it as there is no revival here.
In Phase 4, you simply can just attack it at will. There is no gimmick to worry about. Keep your Taunt up as usual and attack until the boss reaches zero HP.
Floor 3 Strategy
During Phase 1, you'll notice that the boss is very tanky. Not only that, but the boss can apply the Blockade Debuff which will seal any skill above rank 1 and still has a max damage cap of 30% HP. This Debuff can be removed with Megellda or any other Cleanse unit. However, this will be hard to do if the boss has a passive that applies a stat Debuff every turn. Regardless, this phase can take a bit longer if you are forced to use only rank 1 skills as the boss takes reduced damage from them. After some turns, the boss will apply a Debuff that will make your team takes 30% more damage which can be cleansed. Ideally, you'll want to beat the boss either the turn before this is applied or the same turn. If you have Blue Festival Berserk Estarossa once inflicting max stack of 5 Darkness will negate it’s reduction and allow to take normal amount damage from rank 1 cards incase you are unable to cleanse the seal that blocks out any cards higher than rank 1.
In Phase 2, there is no specific gimmick to worry about besides skill deletion. This means the boss has an attack that will delete skills from whoever it hits. This is where a Taunt unit can be very useful as they will take all the hits because the attack is a single-target move, allowing your DPS units to keep their cards. Still, just attack the boss as usual but do keep some strong cards for the next phase. Try to kill the enemy before it can use its Ultimate Move as it will wipe all the Buffs from your team which can cause you issues in the next two phases.
In Phase 3, there is a new gimmick introduced. The boss will seal a certain type of skill every turn for multiple turns (long enough that you will likely finish the battle before it wears off) and it cannot be removed. The order is as follows: Stance, Debuff, Buff, Attack skills, and lastly Ultimate Moves. If you take so long that you get Attack sealed, you should just reset the stage and try again as you will be basically be a sitting duck. This is where Red Queen Festival Diane can suffer as her Taunt is a Stance skill, meaning you either kill the boss in one turn or you accept that you'll lose your Taunt skill for Phase 4. How you approach this phase is up to you, where you can try and kill the enemy as fast as possible to avoid the sealing, or you can let it seal you for some turns to gain some better skills. In most instances, you can let it seal Stances and Debuff skills with no real consequence as most of the team compositions you may use won't use those things. Though the boss using Evasion buff can pose a issue to you if you have no unit with buff removal or ult moves available to use as Evasion doesn't work on Ult Moves.
In Phase 4, your approach to it can vary depending on the passive the Demonic Beast gains. If you gain the "Revive" or "Weapon Destruction" passive, you can simply attack the boss as much as possible because the boss has a Flood Attack skill, which deals more damage based on how high its HP is. The higher the HP is, the more damage that will be dealt. Note that with the Revive passive, it will recover 50% HP after being killed one time, so be prepared to keep attacking. Now, if you get the "Overcome Crisis" passive, you'll have to attack the boss in a different manner. With this passive, the boss will completely heal itself and increase all of its stats when surviving with 25% HP or less. It is essential that you kill the boss without activating the heal as it will much more difficult to kill the Demonic Beast with the increased stats. It's not impossible to win after the passive is activated, but for some, it may be better to simply reset the stage if it activates. A very helpful trick is to close the game if the heal activates and logging back into the game. You will be asked if you want to continue the battle and after accepting, the turn will be reset. This only works if you exit the game while your turn is active because if the boss's turn starts, this will not work. The boss will inflict a stance disable debuff that will overide the grey Stance Disable and you can use Fest Diane's stance again either waiting or use a cleanse unit but it will block out recover cards too.
Floor 4 Strategy
During
Recommended Holy Relics to Craft[]
- Blue/Red Megellda - Will of the Valkyries
- Valenti - Sol's Chariot
- Hawk and Oslo - Tanngjostr's Armor.
- Druid Jenna - Snotras Staff
- Arthur - Frost Gauntlets of Niflheim.
- Rest is up to you.