Iansan Build and Guide

Iansan is a 4-star Electro Polearm user most commonly played as a support for ATK-scaling DPS who feature significant movement in their kit, thanks to her Burst’s buff scaling with it. As a Natlan character, she has access to and utilizes Nightsoul mechanics.  

Both Iansan’s Skill and Burst can put her in Nightsoul’s Blessing, during which she steadily consumes 6 Nightsoul points a second. The primary purpose of this is tied to Iansan’s Burst; using it grants 15 Nightsoul points and summons a “Kinetic Energy Scale”, a gauge which is tied to the active character and buffs their ATK based on Iansan’s ATK. For every Nightsoul point Iansan has, an additional 0.5% of her ATK is counted for the buff - if Iansan has 42 or more Nightsoul points, this gauge is filled and the conversion ratio is increased to a fixed 27% of Iansan’s ATK. The total buff Iansan can provide is also capped at a value depending on the Talent Level: the cap is 690 ATK at Talent Level 10 and 810 at Talent Level 13, requiring Iansan to have 2556 ATK and 3000 ATK respectively to meet it when at above 42 Nightsoul points. 

Iansan’s Skill itself instantly grants 54 Nightsoul points, putting her at her cap and allowing her at a baseline to maintain the maximum ATK conversion ratio for around 2 seconds. Her Kinetic Energy Scale itself then allows Iansan to further extend this, as it logs the active character’s position every second and grants Nightsoul points based on the change in position. This accounts for almost any type of movement, whether vertical, horizontal, or through teleports - the only exception is Bursts such as Keqing or Alhaitham, which return the user to their initial position after the slashes. Doing so allows Iansan to maintain her ATK buff for the full 12 second duration of her Burst, after which her Nightsoul’s Blessing state is forcibly ended. 

Most Natlan characters feature extensive movement as part of their kits, but other DPS units such as Clorinde or Plunging Attack DPS are also naturally effective at restoring Nightsoul points for Iansan. Some units such as Arlecchino or Flins can adjust their combos to achieve the same; the former can dash backwards before starting her N1 to use its gap closing properties to then move back, while the latter can freely Dash between his special Burst and Normal attack casts.

A secondary effect of Iansan’s Nightsoul’s Blessing is that she gains access to an enhanced Charged Attack called “Swift Stormflight”, which deals Electro damage. Beyond its Nightsoul point and Energy generation, Iansan’s Skill also features one other notable effect related to this - allowing Iansan to use Swift Stormflight at no stamina cost by using the Normal Attack input for 5 seconds after her Skill cast.

Using a Swift Stormflight in turn activates Iansan’s Ascension 1 Passive, which provides her a buff for 15 seconds; this buff increases Iansan’s ATK by 20% and improving Iansan’s Nightsoul point generation based on movement, making her easier to both build and use. Her second Ascension Passive is simpler, allowing Iansan to restore HP to the active character when restoring Nightsoul points for 10 seconds after a Nightsoul Burst is triggered. While the healing is insufficient to replace a sustain if one is needed, it does reduce sustain pressure for the team.

Rounding out her base kit are Iansan’s standard Normal and Charged Attacks, which are unspectacular and rarely used.

Finally, as a 4* character, Iansan’s Constellations are relatively accessible - and in Iansan’s case, quite powerful. Her C1 provides some nice Energy restoration, allowing her to build more ATK. Her C2 is far more notable - it allows Iansan to access her first Ascension Passive self-buff when using Burst, and additionally increases the active character’s ATK by 30% for the buff’s duration. This helps shorten Iansan’s rotations while simultaneously improving her support capabilities. C4 offers Iansan significant Quality-of-Life, allowing Iansan to generate Nightsoul points after a teammate uses their Burst while also helping with buff uptime by refunding any overflow Nightsoul points. Her C6 offers another significant boost, additionally adding a 25% DMG Bonus buff into her supportive repertoire and extending her Burst duration by 3 seconds; this retroactively also improves her C4’s value, since it helps keep her Nightsoul points up for the extra duration. While these are overall excellent boosts that help Iansan gain the edge over her competition while making her far easier to use, her best synergies and use cases remain relatively unchanged between C0 and C6.