Heart of the Furnace is one of two new artifact sets introduced in Genshin Impact Version 7.0, obtainable from the Inverted Glacier domain in Everfrozen Earth, Snezhnaya. It is designed for characters that can support Stellar teams due to the ATK and Stellar Glimmer reaction damage bonus it provides, and can also be equipped by sub-DPS characters due to it collectively improving the damage of all party members.
- 2-piece bonus: ATK +18%
- 4-piece bonus: Equipping character gains 12% ATK for 12s when triggering or dealing Stellar Glimmer reaction damage; all nearby party members gain 50% Stellar Glimmer reaction DMG bonus
- Both effects trigger off-field — the holder does not need to be on screen
- The 50% party buff does not stack — only one character in the team should equip 4-piece Heart of the Furnace
- Domain: Inverted Glacier, Everfrozen Earth, Snezhnaya (farmable any day of the week)
- Best holder: Odette — followed by Yae Miko, Cryo Traveler, and Qiqi in specific team setups
- Works in both Stellar-Conduct and Stellar Swirl team compositions
Heart of the Furnace Set Bonuses Explained
2-Piece Bonus: ATK +18%
The 2-piece bonus is a flat 18% ATK increase with no condition, active at all times. This alone makes the set worth equipping on ATK-scaling Stellar Glimmer supports even in hybrid configurations, and pairs cleanly with ATK% main stats to deliver a meaningful damage foundation before the 4-piece effect even activates.
4-Piece Bonus: Personal ATK + 50% Party Stellar DMG
The 4-piece bonus increases the equipping character’s ATK by 12% for 12 seconds when they trigger a Stellar Glimmer reaction or deal Stellar Glimmer reaction damage. It also increases Stellar Glimmer reaction damage dealt by all nearby party members by 50%. Both of these effects can trigger even when the equipping character is not on the field, and the DMG bonus from multiple Artifact Sets with the same name does not stack.
Breaking the 4-piece down into its components: the wearer gains a total of 30% ATK (18% from 2-piece plus 12% from 4-piece conditional) when the trigger is active. The 50% Stellar Glimmer DMG bonus for the entire party is what makes the set uniquely powerful — no other artifact set in Version 7.0 delivers a teamwide reaction damage multiplier of this scale. The 4-piece is not only the famous +50% party buff — it also feeds the wearer 12% ATK, which is why it suits a character who wants ATK anyway rather than a pure buffbot.
The “No Stack” Rule
The most important mechanical note on this set: a second Furnace user adds nothing to the party bonus, so the correct move is one carrier plus different sets on everyone else. Equipping Heart of the Furnace on two characters simultaneously does not double the 50% Stellar DMG buff — the bonus is unique and the second instance is wasted. Every team should have exactly one holder, and every other team member should use a different set.
Off-Field Trigger Requirement
The 4-piece activates when the holder triggers a Stellar Glimmer reaction or deals Stellar Glimmer reaction damage — and crucially, both effects trigger even when the equipping character is not on the field. This means the holder does not need an on-field window to maintain the party buff. A character who applies Cryo or Electro from off-field, triggers a Stellar reaction, and then swaps to the carry will have the 50% buff active throughout the carry’s damage window.
Where to Get Heart of the Furnace
Inverted Glacier is a Domain of Blessing located in Everfrozen Earth, Snezhnaya. It drops both the Heart of the Furnace and Scarlet Proof artifact sets.
To reach it, teleport to the Rankova Zorya train station Teleport Waypoint, then make your way northeast over the ice to find and unlock the domain. The Inverted Glacier artifact domain can be unlocked fairly early into the Version 7.0 Archon Quest.
The domain is available on any day of the week — unlike talent domains, artifact drops have no rotation schedule, so you can farm it whenever your resin allows.
Both sets drop from the same domain. Condensed Resin remains the most efficient farming method. Aim for World Level 8 or higher for consistent 5-star drops.
An additional source exists from the Spiral Abyss: from this Spiral Abyss cycle onward, the Ley Line rewards on Floors 9–12 also distribute these two sets, so Abyss runs feed the same farm.
Heart of the Furnace is available at 4-star and 5-star rarities. The individual pieces are named: Flower of Life (Foundryman’s Conjecture), Plume of Death (Foundryman’s Observation), Sands of Eon (Foundryman’s Calculus), Goblet of Eonothem (Foundryman’s Magnanimity), and Circlet of Logos (Foundryman’s Legacy).
Best Characters for Heart of the Furnace
In general, the 4-piece Heart of the Furnace should be used by support characters in Stellar-Conduct or Stellar Swirl teams. Any Stellar Glimmer team should have someone hold the set for its teamwide Stellar Glimmer DMG% buffs. It is often reserved for support characters to let teammates equip their best personal damage sets.
Odette — Primary Holder
Odette is the default and most efficient holder of Heart of the Furnace across all Version 7.0 Stellar Glimmer teams. Odette comes first — she is an ATK-scaling off-field sub-DPS who deals Stellar Glimmer damage consistently from off-field, meeting the 4-piece trigger condition reliably every rotation. The 12% personal ATK from the 4-piece stacks cleanly with her 18% from the 2-piece, and the 50% party Stellar DMG bonus applies to every reaction triggered by her teammates throughout the carry’s window.
Because Odette will be in virtually every Stellar Glimmer team, placing Heart of the Furnace on her frees other characters — Yae Miko, Sandrone, Cryo Traveler — to use their personal best-in-slot sets (Disenchantment in Deep Shadow, their own optimal sets, etc.) without sacrificing the party buff. For a full breakdown of Odette’s complete build, see the Odette best build guide.
Yae Miko — Alternative in Specific Setups
In team compositions where Odette holds Disenchantment in Deep Shadow for maximum personal damage — a viable choice when Odette has high vertical investment and Yae Miko is the more consistent Stellar reaction trigger — Yae Miko becomes the Heart of the Furnace holder. Her off-field Sesshou Sakura totems deal Electro damage that can trigger Stellar-Conduct reactions consistently, satisfying the 4-piece condition. The ATK buff complements her own ATK-scaling kit.
Cryo Traveler — Budget Team Holder
In free-to-play Stellar-Conduct compositions without Odette, Cryo Traveler is the natural Heart of the Furnace holder. Cryo Traveler applies off-field Cryo and triggers Stellar-Conduct reactions, activating the 4-piece buff consistently. The 30% total ATK boost from the set also improves their personal Cryo damage output.
Alyosha — Niche Alternative
Alyosha can hold Heart of the Furnace but only in one specific scenario: when he is the sole Electro unit in the team and can reliably trigger Stellar-Conduct himself. In most standard compositions with Yae Miko, reaction triggering is inconsistent for Alyosha since Yae Miko will often apply Electro first. In those cases Noblesse Oblige remains his better choice. Heart of the Furnace on Alyosha is only correct when he is the dedicated Stellar-Conduct trigger and no other team member can hold the set more efficiently. For his full weapon and artifact setup, see the best weapons for Alyosha guide.
Qiqi — Sustain Slot Option
Qiqi as a healer in Stellar-Conduct or Stellar Swirl teams can hold Heart of the Furnace if neither Odette nor Yae Miko is available. Her off-field Cryo application can trigger Stellar reactions, and the 50% party buff still applies regardless of who holds it. This is a last-resort option — the buff is fully active no matter who equips the set, and a healer slot getting double duty as the buff holder is a reasonable trade in budget lineups.
Who Should NOT Use Heart of the Furnace
Characters such as Diona, Beidou, and Yumemizuki Mizuki can use Heart of the Furnace, but they have better and more useful artifact sets at their disposal. More broadly, the rule is simple: any character with a personal damage set that outperforms the 30% ATK from Heart of the Furnace should use their own set and let a support character hold Heart of the Furnace for the party buff. The buff is identical regardless of who triggers it — a low-damage support holding the set and triggering it off-field delivers exactly the same 50% party bonus as a high-damage carry holding it on-field.
Never equip Heart of the Furnace on a character outside of a Stellar Glimmer team. If your team cannot convert Superconduct and Swirl into their Stellar versions, both new 7.0 sets are dead stats — that conversion needs Odette or the Cryo Traveler in the party.
Heart of the Furnace vs Disenchantment in Deep Shadow
In Stellar-Conduct teams, Odette has access to a second strong option: Disenchantment in Deep Shadow, which provides 40% Stellar-Conduct reaction damage and 16% CRIT Rate specifically for Stellar-Conduct against enemies. The choice between the two depends on team composition.
Heart of the Furnace is correct when: no other team member can hold it, you are running Stellar Swirl (Disenchantment in Deep Shadow does not work in Swirl), or your team has multiple characters who deal Stellar Glimmer damage and all benefit from the 50% party buff.
Disenchantment in Deep Shadow is correct on Odette when: Yae Miko or another character holds Heart of the Furnace, you are exclusively running Stellar-Conduct, and Odette has enough vertical investment to justify maximising her personal damage over providing the party buff from another source.
In practice, for most accounts, Heart of the Furnace on Odette is the recommended default because it works universally across both Stellar reaction types and requires no secondary holder to cover the party buff.
Main Stats and Substat Priority for Heart of the Furnace Holders
Main stat recommendations follow Odette’s standard build, which applies to all primary Heart of the Furnace holders:
- Sands: ATK%
- Goblet: ATK%
- Circlet: CRIT Rate or CRIT DMG (whichever improves your current ratio)
Substat priority across both new 7.0 sets: CRIT Rate > CRIT DMG > ATK% > Energy Recharge > Elemental Mastery. Stellar Glimmer damage scales primarily with ATK rather than Elemental Mastery, so traditional EM stacking is less valuable than in older reaction teams.
Heart of the Furnace Farming Tips
Use Condensed Resin on each Inverted Glacier run to double the artifact output per entry. At World Level 8 the domain consistently drops 5-star artifacts, so prioritise reaching that World Level before farming seriously. Because both Heart of the Furnace and Scarlet Proof drop from the same domain, every run gives pieces of both sets — build your Odette’s Heart of the Furnace set first, then use surplus pieces and Abyss rewards to work on Scarlet Proof for Stellar Swirl carries.
Decide which characters need Heart of the Furnace first, then fill Scarlet Proof supports. Avoid the mistake of farming before Adventure Rank 45 if you still need talent books and boss materials. Unlock the Inverted Glacier domain early in the Version 7.0 Archon Quest and begin running it as soon as your resin budget permits.
For a full picture of how Heart of the Furnace fits into Odette’s complete artifact setup alongside her stat targets and alternative sets, see the Odette best build guide. For context on the Stellar Glimmer reactions this set is built around, see the Stellar Glimmer reaction guide.
Frequently Asked Questions
What does Heart of the Furnace do in Genshin Impact?
The 2-piece grants ATK +18%. The 4-piece increases the holder’s ATK by 12% for 12 seconds when they trigger or deal Stellar Glimmer reaction damage, and simultaneously grants all nearby party members a 50% Stellar Glimmer reaction damage bonus. Both effects work off-field. Multiple instances of the 4-piece bonus do not stack — only one character in the team should equip the set.
Where do you get Heart of the Furnace in Genshin Impact?
Heart of the Furnace drops from the Inverted Glacier Domain of Blessing in Everfrozen Earth, Snezhnaya, alongside the Scarlet Proof artifact set. Teleport to Rankova Zorya station and head northeast to find the domain. It can be farmed any day of the week. Floors 9–12 of the Spiral Abyss also reward pieces from both sets.
Who is the best character for Heart of the Furnace in Genshin Impact?
Odette is the primary and most efficient holder. She deals off-field Stellar Glimmer damage consistently, triggering the 4-piece reliably, and frees other team members to use their personal best-in-slot sets. Yae Miko, Cryo Traveler, and Qiqi are viable alternatives in specific compositions.
Can two characters use Heart of the Furnace in the same team?
No — the 50% Stellar Glimmer party damage bonus does not stack. A second holder adds no additional buff to the team. Equip the set on one character only and give every other team member a different artifact set.
Does Heart of the Furnace work for both Stellar-Conduct and Stellar Swirl?
Yes. The 50% Stellar Glimmer reaction damage bonus applies to both Stellar-Conduct and Stellar Swirl damage, making Heart of the Furnace the universal set for any Stellar Glimmer team. By contrast, Disenchantment in Deep Shadow only benefits Stellar-Conduct.
Is Heart of the Furnace good for Alyosha?
Only in solo-Electro compositions where Alyosha is the consistent Stellar-Conduct trigger. In standard teams with Yae Miko, Alyosha struggles to reliably activate the 4-piece trigger, and Noblesse Oblige remains his better default choice.
