5-Star
Lightning
The Nihility
S+ Tier
Lightning
The NihilityThe hardest-hitting Lightning DPS in Honkai: Star Rail. Acheron obliterates enemies through her Slashed Dream Ultimate, fueled by Nihility teammates who stack Crimson Knots and unlock a permanent 160% damage amplifier no other carry can match at this investment level.
Acheron
Sheathed Lightning / Galaxy RangerBest Light Cone
Along the Passing Shore
Best Relic Set
Pioneer Diver 4pc
Planar Set
Izumo Gensei
Team Rule
2 Nihility Allies
Best Partner
Skills
Basic
Trilateral Wiltcross
Deals Lightning DMG to a single target. Low priority in gameplay since using the Skill is almost always better, but it still deals respectable scaling damage when needed.
50%
of ATK
Skill
Octobolt Flash
Gains 1 Slashed Dream point and applies 1 Crimson Knot to a single target. Hits that target for 80% ATK, with 30% ATK splash to adjacent enemies. Your main tool for charging the Ultimate when allies are not debuffing.
80%
main target
Ultimate
Slashed Dream Cries in Red
Requires 9 Slashed Dream points (not energy). Unleashes 3 Rainblade hits plus 1 Stygian Resurge, consuming all Crimson Knots. Each removed Knot adds up to 36% extra DMG per Rainblade hit. Total single-target damage reaches 223.2% ATK, with 180% ATK hitting all other enemies through Stygian Resurge.
223%
single target cap
Talent
Atop Rainleaf Hangs Oneness
This is the engine. Whenever any ally inflicts a debuff during their ability, Acheron gains 1 Slashed Dream point and applies 1 Crimson Knot to the enemy with the most stacks (once per ability use). During the Ultimate, enemies also lose 10% All-Type RES. This is why the entire team is built around debuffing constantly.
10%
RES shred on ult
Technique
Quadrivalent Ascendance
Immediately attacks the enemy. At wave start, deals 200% ATK Lightning DMG to all enemies and reduces their Toughness regardless of Weakness type. After using the Ultimate in combat, gains 1 Slashed Dream point and applies 1 Crimson Knot to a random enemy. Instantly defeats normal enemies in open world without consuming Technique Points.
200%
wave start AoE
Build Targets
Relic Main Stats
Head
HP (fixed)
Hands
ATK (fixed)
Body
CRIT Rate
or CRIT DMG
Feet
Speed
or ATK%
Planar Sphere
Lightning DMG
or ATK%
Link Rope
ATK%
Stat Targets
Substat Priority
01
CRIT Rate / CRIT DMG
balance 1:2
02
ATK%
scales all hits
03
Speed
more turns
04
Effect RES
prevents CC
Skill Upgrade Order
Ult
1st
Skill
2nd
Talent
3rd
Basic
Skip
Ultimate first since it is the primary damage source. Skill second for Crimson Knot charging. Basic ATK rarely sees use at high investment levels.
Best Light Cones
#1
Along the Passing Shore
Her signature. Massive CRIT DMG bonus and a 24% Ultimate DMG bonus when hitting debuffed targets. Unmatched across almost all scenarios at any investment level.
#2
Incessant Rain
Strong alternative providing CRIT Rate and an 8% DMG taken debuff on enemies. Great if you already own it from a previous banner.
#3
Good Night and Sleep Well
Best free-to-play option. Scales well with Acheron's debuff-heavy teams, stacking up to 36% bonus DMG from the passive alone.
#4
Boundless Choreo
Solid 4-star providing CRIT Rate when hitting debuffed enemies. Easy to superimpose, reliable damage without event farming.
#5
Fermata
Budget option. The element-specific DMG bonus does not apply to Acheron directly, but the base ATK scaling still provides a modest upgrade over nothing.
Best Relics
Cavern Sets
1
Pioneer Diver of Dead Waters
Her best-in-slot cavern set by a clear margin. The 4-piece bonus amplifies damage against debuffed enemies and boosts CRIT stats, stacking directly into Acheron's playstyle since every enemy in her team will be permanently debuffed. Nothing else competes on fully debuffed targets.
2
Scholar Lost in Erudition
Competitive alternative. Boosts CRIT Rate and increases DMG after using the Ultimate or Skill. Works well if your Pioneer pieces rolled poorly on substats.
3
Band of Sizzling Thunder
Lightning DMG bonus set. Not as strong as Pioneer in most situations, but a usable option if you already have well-rolled pieces.
Planar Ornament Sets
1
Izumo Gensei and Takama Divine Realm
Best planar set for Acheron. Provides CRIT Rate plus an additional 12% CRIT Rate on the Sphere piece when allies share the same path. Nihility teammates all share The Nihility path, so this bonus is almost always active in her best teams.
2
Inert Salsotto
Backup option. Boosts CRIT Rate and provides a 15% Ultimate DMG bonus when CRIT Rate is at 50% or higher. Acheron easily clears that threshold with a proper build.
Best Teams for Acheron
The Abyss trace gives 160% DMG with 2 Nihility allies. Always fill at least 2 Nihility slots. At E2, one Nihility ally is enough for the full bonus.
01 · Premium
Best-in-slot composition
Jiaoqiu applies massive debuffs for Slashed Dream stacking. Black Swan provides persistent DoT and Nihility qualification. Aventurine shields without needing heals. Top tier across all endgame content.
02 · Silver Wolf Variant
No Black Swan required
Silver Wolf implants Lightning Weakness on any target, giving Acheron consistent toughness break access. Great for players without Black Swan.
03 · Sunday Flex
1 Nihility (115% Abyss bonus)
04 · F2P · Budget
All accessible characters
Pela is a free 4-star providing reliable DEF shred and Nihility qualification. Combined with Silver Wolf, you hit the 2-Nihility threshold for the full 160% Abyss bonus with no limited 5-stars required outside of Acheron herself.
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Eidolons
E
1
Silenced Sky Spake Sooth
CRIT Rate increases by +18% when dealing damage to debuffed enemies. Since every enemy in an Acheron team will be debuffed, this is effectively a permanent 18% CRIT Rate bonus with no additional building required.
High Pull Value
E
2
Mute Thunder in Still Tempest
Reduces required Nihility allies for the Abyss trace maximum effect by 1. Acheron only needs 1 Nihility ally for the full 160% DMG multiplier, freeing your fourth slot for any unit. She also auto-gains 1 Slashed Dream point and 1 Crimson Knot at the start of each of her turns.
Game Changer
E
3
Frost Bites in Death
Ultimate level +2 (max 15) and Basic ATK level +1 (max 10). The Ultimate level increase provides a meaningful damage bump on what is already her biggest hit.
Solid Upgrade
E
4
Shrined Fire for Mirrored Soul
Enemies entering combat are afflicted with a Vulnerability state that increases Ultimate DMG taken by +8%. Applies automatically at the start of each fight.
Good Passive
E
5
Strewn Souls on Erased Earths
Skill level +2 (max 15) and Talent level +2 (max 15). Incremental improvements to two important parts of her kit. Solid but not transformative on its own.
Incremental
E
6
Apocalypse, the Emancipator
All-Type RES PEN for Ultimate DMG increases by +20%. Basic ATK and Skill DMG are now treated as Ultimate DMG and can break Toughness regardless of enemy Weakness type, triggering Lightning Break when they do. Simulation data shows roughly a 70% total damage increase from E0 to E6, taking single-target benchmarks from 701,610 to 1,191,414.
Massive Upgrade
Major Traces
Red Oni
Ascension 2
When battle starts, immediately gains 5 Slashed Dream points and applies 5 Crimson Knots to a random enemy. Acheron also gains up to 3 stacks of Quadrivalent Ascendance, letting her often fire her first Ultimate within the opening actions of a fight.
The Abyss
Ascension 4
With 1 Nihility ally: DMG increases to 115% of base. With 2 Nihility allies: DMG increases to 160% of base. This trace is why Acheron's team composition is non-negotiable. Always run at least 1 Nihility support and prioritize 2.
Thunder Core
Ascension 6
When Rainblade hits enemies with Crimson Knot stacks, Acheron's DMG increases by +30% per stack (up to 3 stacks, lasting 3 turns). When Stygian Resurge triggers, deals 6 additional Lightning hits at 25% ATK each to random enemies as part of Ultimate DMG.
+24%
CRIT DMG
+28%
ATK
+4.8%
Lightning DMG
Upgrade Materials
Dream Collection Component
Character Ascension
Fiery Spirit
Trace Material
Shape Shifter's Lightning Staff
Boss Drop
Past Evils of the Borehole Planet Disaster
Weekly Boss Drop
Frequently Asked Questions
No. Acheron performs well with Good Night and Sleep Well or Boundless Choreo at lower investment levels. Her signature (Along the Passing Shore) is a meaningful upgrade but not required to clear all endgame content at E0.
Acheron needs 9 Slashed Dream points to activate her Ultimate (not SP or energy). She gains points from using her Skill (1 point) and from allies inflicting debuffs during their abilities (1 point per ability use, once per use). The Ascension 2 trace starts every battle with 5 points already stacked, so she often fires her first Ultimate within the opening turns.
Yes, but you sacrifice the full 160% Abyss multiplier. With 0 Nihility teammates she gets no bonus; 1 Nihility gives 115%; 2 Nihility gives 160%. At E2, the requirement drops by 1, so she needs only 1 Nihility ally for the full 160%. Non-Nihility supports like Sunday or Sparkle can still outperform in specific scenarios if their buffs exceed the missing Nihility multiplier.
Acheron is primarily a single-target or light AoE DPS. She works in Pure Fiction but is outpaced by dedicated AoE units like Jade or Himeko in that specific mode. Her primary strengths are Memory of Chaos and Apocalyptic Shadow, where burst single-target damage is the most valuable output.
Aim for either 101 SPD (enough for consistent action economy with your supports) or 134+ SPD (to gain extra turns relative to slower enemies). Most players do not need to hit a specific speed breakpoint since Acheron's Ultimate is driven by Slashed Dream points, not turn count alone. Prioritize CRIT and ATK substats before pushing speed.
E1 and E2 are the most impactful. E1 gives 18% CRIT Rate against debuffed targets with no extra build cost. E2 reduces the Nihility requirement by 1, freeing your team composition significantly. E6 roughly doubles her total damage output in simulations but costs 6 copies of a limited 5-star, so it is best reserved for players specifically wanting to maximize her ceiling rather than those looking for account-wide efficiency.
