HSR Flame Reaver of the Deepest Dark Boss Fight Guide

In Short
  • Flame Reaver of the Deepest Dark is the final major boss in the Honkai Star Rail 3.1 Trailblazing missions.
  • To defeat him, choose characters with Ice, Lightning, or Quantum damage type, and make sure they have multiple attacks, or multiple-target attacks.
  • During the fight, focus on defeating the summoned vessels of the boss first to stop him from dealing a ton of damage with his enhanced attack.

Honkai Star Rail 3.1 trailblazing mission takes the trailblazer and chrysos heirs to the Grove of Epiphany, where they meet a new challenger from the Black Tide — Flame Reaver of the Deepest Dark. The story further reveals that it was this enemy that destroyed Phainon’s home village and that he is hunting for the Titan core flames. The story eventually leads to a final altercation with the Flame Reaver of the Deepest Dark boss in Honkai Star Rail. This boss fight is quite hard as he deals a ton of AoE damage with his enhanced attack. If you are struggling with the Flame Reaver of the Deepest Dark boss fight in Honkai Star Rail, here is a complete how-to-defeat guide to help you out.

What Makes the Flame Reaver of the Deepest Dark Boss Fight Hard?

The Flame Reaver of the Deepest boss fight is hard mainly due to the high amount of damage output from the boss. The boss can self buff based on the number of Long-Shattered vessel on the field, dealing a massive AoE attack that deals a ton of damage. The boss also continuously summons the Long-Shattered vessel after each turn, forcing players to prioritize defeating the vessels over dealing damage to them.

Flame Reaver of the deepest dark enhanced attack HSR boss guide
Image Credit: Hoyoverse/Honkai Star Rail (screenshot by Sanmay Chakrabarti/Beebom)

As long as you can manage defeating the vessels and dealing damage to the Flame Reaver at a consistent pace, while keeping the party alive, you should be able to easily defeat the boss.

Best Characters and Teams for the Flame Reaver Boss Fight in HSR

Image Credit: Hoyoverse/Honkai Star Rail (screenshot by Sanmay Chakrabarti/Beebom)

The Flame Reaver boss fight can be trivialized with the correct selection of characters to form a team. As the fight doesn’t provide any fixed characters, here are the characters that you should pick for the Flame Reaver of the Deepest Dark boss fight:

  • Pick characters with the Ice, Lightning, or Quantum damage type. The vessels also share the same weakness type, so having these elements in the team will allow your characters to easily deal break damage to the vessel without wasting your main DPS’ turn.
  • The next thing you need to do is pick characters with multiple attacks or multiple-target attacks. Both Follow-up attacks and AoE attacks are best for taking down the vessels during the Flame Reaver boss fight in HSR.
  • Prioritize shield Sustainers over healers to tank the massive damage output from Flame Reaver’s enhanced attacks. If you don’t have a good shielder, pick healers that have reflex heals to keep the team alive against Flame Reaver’s enhanced attacks.
DPS (5-star)DPS (4-star)SupportSustain
The HertaXueyiTribbieAventurine
JingliuMozeTingyunGeopard
AcheronMishaRuan MeiLingsha
KafkaServalRobinHuohuo
Jing YuanHunt March 7thSundayLuocha
JadeHertaRemembrance TrailblazerGallagher

The best teams for the Reaver of the Deepest Dark boss fight are:

DPSSupport/Sub DPSSupportSustain
The HertaJadeTribbieLingsha
AcheronJiaoqiuPelaAventurine
KafkaBlack SwanTribbieGallagher
JingliuSundayTingyunHuohuo
XueyiHunt March 7thRemembrance TrailblazerGallagher

HSR Flame Reaver of the Deepest Dark Boss Fight Strategy

Image Credit: Hoyoverse/Honkai Star Rail (screenshot by Sanmay Chakrabarti/Beebom)

When fighting Flame Reaver of the Deepest Dark, you need to prioritize defeating the Long-Shattered vessels that are summoned by the boss. As long as these summons stay on the field, Flame Reaver gets continuous buffs, and his main charged attack deals a ton of damage. The main charged attack can even kill the entire team with one hit if all the vessels are undefeated during the attack.

The fight is pretty simple; all you need to do is deal continuous damage to the Flame Reaver of the Deepest Dark, while defeating the vessels as he summons it. Breaking the toughness bar of the vessels is a good way to defeat them with your non-DPS characters.

Image Credit: Hoyoverse/Honkai Star Rail (screenshot by Sanmay Chakrabarti/Beebom)

Due to the nature of the fight and the high damage output from the boss, it is best to sustain with a Shielder like Aventurine or Geopard. They will help you survive one-shot attacks when you fail to defeat all the vessels before Flame Reavers’ enhanced attack.

Using characters like Robin or Remembrance Trailblazer can also be of great benefit as they action forward allies, giving them more opportunities to defeat the vessels before the big attack. Also, don’t forget to use Mydei’s support to deal high AoE damage to the vessels. So, that’s everything you need to know about how to defeat Flame Reaver of the Deepest Dark in Honkai Star Rail. If you have any further questions about this boss fight, ask us in the comments, and we will try to help you out.

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