Iansan is a 4-star Electro polearm user in Genshin Impact, designed purely as a support character. First revealed in the Teyvat Chapter Storyline Preview: Travail trailer, she has been one of the most anticipated characters for years. Now that she is finally playable, Iansan stands out for her strong ATK buffs, a little bit of healing, and flexible support utility—all without the typical positioning restrictions of other supports like Bennett.
Since Iansan’s kit revolves around enhancing teammates rather than dealing damage, choosing the right weapon is essential to maximizing her effectiveness. In this guide, we will go over the best 5-star, 4-star, and free-to-play polearms that boost her support potential, helping you build her into the ultimate team enhancer.
Who is Iansan in Genshin Impact? Character kit, ascension materials, and more
Best 5-star Weapons for Iansan in Genshin Impact
When it comes to Iansan, all she wants is ATK% and is a little Energy Recharge to reach her full potential. When looking for best Iansan weapons in Genshin Impact, you should look for polearms with high base ATK and Energy Recharge. With this in mind, let’s first go over the 5-star polearms that would be a good fit for our little coach, Iansan:
1) Calamity Quelller (⭐️⭐️⭐️⭐️⭐️)
| Weapon | Stats | Passive |
 | Base ATK 741 ATK 16.5% | Extinguishing Precept Gain 12% All Elemental DMG Bonus. Obtain Consummation for 20s after using an Elemental Skill, causing ATK to increase by 3.2% per second. This ATK increase has a maximum of 6 stacks. When the character equipped with this weapon is not on the field, Consummation’s ATK increase is doubled. |
Calamity Queller is an excellent weapon for Iansan because of its exceptionally high Base ATK of 741, the highest among all polearms. Since Iansan’s ATK-scaling buffs directly benefit from her weapon’s Base ATK, this makes Calamity Queller one of the best options to maximize her support potential. Additionally, the weapon provides 16.5% ATK from its sub-stat, further enhancing her ability to strengthen her teammates.
While its passive is more tailored for Shenhe or a DPS like Xiao, the off-field ATK increase can still be useful for Iansan, as she usually swaps in and out to provide buffs. However, it lacks Energy Recharge, meaning she will need ER-focused artifacts or teammates to maintain her Elemental Burst uptime. Despite this, the sheer ATK value it provides makes it a solid choice for boosting her support capabilities.
Pros:
- ✅ Best Base ATK of any polearm, which directly strengthens her ATK buff.
- ✅ ATK% sub-stat further increases her buff effectiveness.
- ✅ Passive’s off-field ATK bonus boost aligns well with her playstyle.
Cons:
- ❌ No Energy Recharge, meaning you will need ER from artifacts or team support.
- ❌ Passive is mostly designed for DPS characters, making some of its effects underutilized on Iansan.
- ❌ A 5-star limited weapon, making it hard to obtain.
2) Engulfing Lightning (⭐️⭐️⭐️⭐️⭐️)
| Weapon | Stats | Passive |
 | Base ATK 605 ER 55.1% | Timeless Dream: Eternal Stove ATK increased by 28% of Energy Recharge over the base 100%. You can gain a maximum bonus of 80% ATK. Gain 30% Energy Recharge for 12s after using an Elemental Burst. |
Engulfing Lightning is one of the best polearms for Iansan due to its Energy Recharge secondary stat, which helps her maintain frequent Elemental Bursts. Since her entire support kit revolves around her Burst, having more Energy Recharge ensures she can consistently provide ATK buffs to her team. The weapon’s passive further enhances this by converting Energy Recharge into bonus ATK, making it a perfect fit for Iansan’s ATK-scaling buffs. Additionally, it increases Energy Recharge after using an Elemental Burst, further improving her ability to generate energy.
While it does not have as high of a Base ATK as Calamity Queller, the extra Energy Recharge makes it a more comfortable choice, allowing Iansan to focus on ATK% artifacts rather than worrying about energy needs. This makes Engulfing Lightning one of the most well-rounded options for her support role.
Pros:
- ✅ High Energy Recharge helps maintain Iansan’s Elemental Burst uptime.
- ✅ Passive converts Energy Recharge into ATK, directly improving her buffs.
- ✅ Extra Energy Recharge after Burst use ensures a smoother energy cycle.
Cons:
- ❌ Lower Base ATK (608) compared to Calamity Queller, which reduces her total ATK scaling.
- ❌ The passive’s ATK boost is personal, so it does not directly buff teammates.
- ❌ Requires a high Energy Recharge build to maximize its passive effect.
3) Skyward Spine (⭐️⭐️⭐️⭐️⭐️)
| Weapon | Stats | Passive |
 | Base ATK 674 ER 36.8% | Black Wing Increases CRIT Rate by 8% and increases Normal ATK SPD by 12%. Additionally, Normal and Charged Attacks hits on opponents have a 50% chance to trigger a vacuum blade that deals 40% of ATK as DMG in a small AoE. This effect can occur no more than once every 2s. |
Skyward Spine is a solid weapon choice for Iansan, offering a balance between high Base ATK (674) and Energy Recharge (36.8%), making it a great option for keeping her Elemental Burst active. While its passive provides CRIT Rate and an extra vacuum blade attack, these effects are not particularly useful for Iansan since she is a support character.
However, since Skyward Spine is a standard banner weapon, many long-time players may already have it, making it an accessible and effective choice.
Pros:
- ✅ High Base ATK (674) boosts Iansan’s ATK-based buffs.
- ✅ 36.8% Energy Recharge makes Burst uptime much smoother.
- ✅ Standard banner weapon, meaning veteran players are more likely to own it.
Cons:
- ❌ Passive effects (CRIT Rate and vacuum blade) are not useful for Iansan’s support role.
- ❌ Not as strong as Calamity Queller in terms of ATK scaling.
Best 4-star Weapons for Iansan in Genshin Impact
While 5-star weapons like Calamity Queller and Engulfing Lightning are excellent for Iansan, she also has some great 4-star options that can provide high Base ATK and Energy Recharge. These weapons are more accessible and can still help maximize her support potential, making them ideal choices for players who do not have access to limited 5-star polearms.
1) Favonius Lance (⭐️⭐️⭐️⭐️)
| Weapon | Stats | Passive |
 | Base ATK 565 ER 30.6% | Windfall CRIT Hits have a 60% chance to generate a small amount of Elemental Particles, which will regenerate 6 Energy for the character. Can only occur once every 12s. |
Favonius Lance is one of the original 4-star polearms in Genshin Impact and remains a solid support option for Iansan. It has a high Base ATK for a 4-star weapon and provides Energy Recharge as its secondary stat, which helps her consistently use her Elemental Burst.
The weapon’s passive generates energy particles when landing a critical hit, benefiting both Iansan and her teammates by accelerating their Burst uptime. However, to trigger this effect reliably, you need to build some Crit Rate on her, which is not typically a priority for her kit.
Pros:
- ✔️ High Base ATK for a 4-star weapon
- ✔️ Energy Recharge secondary stat for frequent Bursts
- ✔️ Generates energy for both Iansan and her teammates
Cons:
- ❌ Requires some Crit Rate investment to activate the passive
2) Tamayuratei no Ohanashi (⭐️⭐️⭐️⭐️)
| Weapon | Stats | Passive |
 | Base ATK 565 ER 30.6% | Busybody’s Running Light Increase ATK by 40% and Movement SPD by 10% for 10s when using an Elemental Skill. |
Tamayuratei no Ohanashi is a limited-time event weapon from Genshin Impact Version 5.4, making it an exclusive choice for players who obtained it. It offers a solid Base ATK of 565 and a 30.6% Energy Recharge secondary stat, helping Iansan maintain her Burst uptime.
The passive boosts ATK by 40% for 10 seconds upon using an Elemental Skill, which works well with Iansan’s kit since her buffs scale with ATK. Additionally, the 10% Movement Speed increase adds extra mobility, though it is not essential for her combat role.
Pros:
- ✔️ Decent Base ATK and Energy Recharge
- ✔️ Strong ATK buff (40%) that benefits her support role
- ✔️ Free-to-play friendly for those who obtained it
Cons:
- ❌ Event-exclusive, meaning new players cannot obtain it
- ❌ The Movement Speed bonus is not very useful for Iansan in combat
3) Wavebreaker’s Fin (⭐️⭐️⭐️⭐️)
| Weapon | Stats | Passive |
 | Base ATK 620 ATK 13.8% | Watatsumi Wavewalker For every point of the entire party’s combined maximum Energy capacity, the Elemental Burst DMG of the character equipping this weapon is increased by 0.12%. A maximum of 40% increased Elemental Burst DMG can be achieved this way. |
Wavebreaker’s Fin stands out with the highest Base ATK (620) among all 4-star polearms and an ATK% secondary stat (13.8%), making it a decent option for Iansan’s ATK-scaling buffs. However, it lacks Energy Recharge, which is crucial for her Burst uptime.
The passive, which boosts Elemental Burst DMG based on the team’s total Energy capacity, is completely wasted on Iansan since she is not a Burst DPS. Additionally, it is a limited 4-star weapon that rarely appears in weapon banners, making it hard to obtain.
Pros:
- ✔️ Highest Base ATK among 4-star polearms
- ✔️ Additional ATK% from its secondary stat
Cons:
- ❌ No Energy Recharge, making Burst uptime harder to maintain
- ❌ Passive is useless for Iansan since she is not a Burst DPS
- ❌ Rarely available due to limited weapon banner appearances
Final words
Iansan has great weapon options that boost her Base ATK and Energy Recharge, enhancing her support role. Calamity Queller and Skyward Spine are top 5-star choices, while Favonius Lance and Tamayuratei no Ohanashi shine among 4-stars. Avoid weapons like Wavebreaker’s Fin, as they do not benefit her kit. Pick a weapon that helps maintain her Elemental Burst and maximizes her team buffs.
