Honkai Star Rail Guide

Acheron Build Guide

SS Tier

Acheron Stats at Max Lv

Acheron Overview

Acheron is a Lightning Nihility character in HonKai StarRail.
A drifter claiming to be a Galaxy Ranger. Her true name is unknown.
She walks the cosmos alone, carrying with her a long sword.

Acheron Lv
Ascension Materials

Level: 0

Acheron conditions to stack “Slashed Dream” and “Crimson Knot”

Debuffs inflicted by the Nihility character

	Normal ATK	Skill	Ultimate	Talent	Technique
Black Swan	Arcana (65%)	Arcana	Epiphany	Arcana (65%) triggers when each wave inflicts DOT on the enemy.	Arcana
Silver Wolf	Random Bug (Talent 72%)	Reduce the All-Type RES	Reduce DEF	-	-
Kafka	-	-	Shock	follow-up attack inflict Shock (1 time per turn)	Shock
Welt	-	Reduce SPD (75%) *3	Imprisoned	-	Imprisoned
Guinaifen	Burn (80%) by Trace	Burn	-	Firekiss	Firekiss
Luka	-	Bleed	DMG received	-	Bleed
Sampo	Wind Shear (Talent 65%)	Wind Shear(Talent 65%) *4	Increase DOT DMG	-	-
Pela	-	-	Reduce DEF	-	Reduce DEF

Conditions to stack "Slashed Dream" for Acheron's Ultimate:

(Technique) Enter battle: +1
(Trace) at the start of battle: +5 (only once)
(Normal Attack): +1
(Skill): +2
(Talent): Enemy falls into a debuff after teammate or enemy attack: +1
The Preservation Character, when utilizing LightCone's ability "Trend of the Universal Market": +1

Conditions to stack "Crimson Knot" on enemies:

(Technique): Enter battle: +1 on a random enemy
(Trace) at the start of battle: +5 on a random enemy
(Normal Attack): +1 on the specified enemy
(Skill): +2 on the specified enemy
(Talent): Enemy falls into a debuff after teammate or enemy attack: +1
This effect triggers up to 1 time per action:
(Welt's skill -> 1 stack of "Crimson Knot" will be inflicted on the enemy with the most "Crimson Knot" stacks.)
The Preservation Character, when utilizing LightCone's ability "Trend of the Universal Market": +1

Equipping the following LightCone situation on the Nihility character before using their Ultimate: After using one normal attack, followed by using the Ultimate, will grant Acheron 2 stacks of "Crimson Knot".

Nihility Light Cone	Debuff
Patience Is All You Need	If the wearer hits an enemy target that is not afflicted by Erode, there is a 100% base chance to inflict Erode to the target
Resolution Shines As Pearls of Sweat	When the wearer hits an enemy and if the hit enemy is not already Ensnared, then there is a 60% base chance to Ensnare the hit enemy. Ensnared enemies' DEF decreases by 12% for 1 turn(s).
Incessant Rain	After the wearer uses their Basic ATK, Skill, or Ultimate, there is a 100% base chance to implant Aether Code on a random hit target that does not yet have it. Targets with Aether Code receive 12% increased DMG for 1 turn.

Conditions to stack "Slashed Dream" for Acheron's Ultimate:

(Technique) Enter battle: +1
(Trace) at the start of battle: +5 (only once)
(Normal Attack): +1
(Skill): +1
(Talent): Enemy falls into a debuff after teammate or enemy attack: +1
(E2) At the beginning of Acheron's turn: +1
The Preservation Character, when utilizing LightCone's ability "Trend of the Universal Market": +1

Conditions to stack "Crimson Knot" on enemies:

Use technique: Enter battle: +1 on a random enemy
(Trace) at the start of battle: +5 on a random enemy
(Normal Attack): +1 on the specified enemy
(Skill): +1 on the specified enemy
(Talent): Enemy falls into a debuff after teammate or enemy attack: +1
This effect triggers up to 1 time per action:
(Welt's skill -> 1 stack of "Crimson Knot" will be inflicted on the enemy with the most "Crimson Knot" stacks.)
(Silver Wolf Skill + LC "Incessant Rain")
(Pela Ultimate + LC "Resolution Shines As Pearls of Sweat")
(E2) At the beginning of Acheron's turn: +1 on the enemy with the most "Crimson Knot" stacks.
The Preservation Character, when utilizing LightCone's ability "Trend of the Universal Market": +1

Nihility Light Cone	Debuff
Patience Is All You Need	If the wearer hits an enemy target that is not afflicted by Erode, there is a 100% base chance to inflict Erode to the target
Resolution Shines As Pearls of Sweat	When the wearer hits an enemy and if the hit enemy is not already Ensnared, then there is a 60% base chance to Ensnare the hit enemy. Ensnared enemies' DEF decreases by 12% for 1 turn(s).
Incessant Rain	After the wearer uses their Basic ATK, Skill, or Ultimate, there is a 100% base chance to implant Aether Code on a random hit target that does not yet have it. Targets with Aether Code receive 12% increased DMG for 1 turn.

E0 & Along the Passing Shore S1

Conditions to stack "Slashed Dream" for Acheron's Ultimate:

(Technique) Enter battle: +1
(Trace) at the start of battle: +5 (only once)
(Normal Attack): +1, +1 [LightCone Effect]
(Skill): +1, +1 [LightCone Effect]
(Talent): Enemy falls into a debuff after teammate or enemy attack: +1
The Preservation Character, when utilizing LightCone's ability "Trend of the Universal Market": +1

Conditions to stack "Crimson Knot" on enemies:

(Technique) Enter battle: +1 on a random enemy
(Trace) at the start of battle: +5 on a random enemy
(Normal Attack): +1, +1 [LightCone Effect] on the specified enemy
(Skill): +1, +1 [LightCone Effect] on the specified enemy.
Adjacent targent: +1 [LightCone Effect]
(Talent): Enemy falls into a debuff after teammate or enemy attack: +1
This effect triggers up to 1 time per action:
(Welt's skill -> 1 stack of "Crimson Knot" will be inflicted on the enemy with the most "Crimson Knot" stacks.)
The Preservation Character, when utilizing LightCone's ability "Trend of the Universal Market": +1

Nihility Light Cone	Debuff
Patience Is All You Need	If the wearer hits an enemy target that is not afflicted by Erode, there is a 100% base chance to inflict Erode to the target
Resolution Shines As Pearls of Sweat	When the wearer hits an enemy and if the hit enemy is not already Ensnared, then there is a 60% base chance to Ensnare the hit enemy. Ensnared enemies' DEF decreases by 12% for 1 turn(s).
Incessant Rain	After the wearer uses their Basic ATK, Skill, or Ultimate, there is a 100% base chance to implant Aether Code on a random hit target that does not yet have it. Targets with Aether Code receive 12% increased DMG for 1 turn.

E2 & Along the Passing Shore S1

Conditions to stack "Slashed Dream" for Acheron's Ultimate:

(Technique) : Enter battle: +1
(Trace) at the start of battle: +5 (only once)
(Normal Attack): +1,+1 [LightCone Effect]
(Skill): +1, +1 [LightCone Effect]
(Talent): Enemy falls into a debuff after teammate or enemy attack: +1
(E2) At the beginning of Acheron's turn: +1
The Preservation Character, when utilizing LightCone's ability "Trend of the Universal Market": +1

Conditions to stack "Crimson Knot" on enemies:

Use technique: Enter battle: +1 on a random enemy
(Trace) at the start of battle: +5 on a random enemy
(Normal Attack): +1, +1 [LightCone Effect] on the specified enemy
(Skill): +1, +1 [LightCone Effect] on the specified enemy.
Adjacent targent: +1 [LightCone Effect]
(Talent): Enemy falls into a debuff after teammate or enemy attack: +1
This effect triggers up to 1 time per action:
(Welt's skill -> 1 stack of "Crimson Knot" will be inflicted on the enemy with the most "Crimson Knot" stacks.)
The Preservation Character, when utilizing LightCone's ability "Trend of the Universal Market": +1
(E2) At the beginning of Acheron's turn: +1 on the enemy with the most "Crimson Knot" stacks.

Nihility Light Cone	Debuff
Patience Is All You Need	If the wearer hits an enemy target that is not afflicted by Erode, there is a 100% base chance to inflict Erode to the target
Resolution Shines As Pearls of Sweat	When the wearer hits an enemy and if the hit enemy is not already Ensnared, then there is a 60% base chance to Ensnare the hit enemy. Ensnared enemies' DEF decreases by 12% for 1 turn(s).
Incessant Rain	After the wearer uses their Basic ATK, Skill, or Ultimate, there is a 100% base chance to implant Aether Code on a random hit target that does not yet have it. Targets with Aether Code receive 12% increased DMG for 1 turn.

Acheron Skills

Trilateral Wiltcross

Acheron Normal Attack

Single Target : 30

Level: 1

Deals Lightning DMG equal to 50% Acheron’s ATK to a single enemy.

Octobolt Flash

Acheron Skill

Blast
Single Target: 60 / Blast: 30

Level: 1

Gains 1 point(s) of Slashed Dream. Inflicts 1 stack(s) of Crimson Knot on a single target enemy, dealing Lightning DMG equal to of Acheron’s ATK to this target, as well as Lightning DMG equal to of Acheron’s ATK to adjacent targets.

Slashed Dream Cries in Red

Acheron Ultimate

AoE ATK
Single Target: 15 / AoE: 15
Energy Cost : Slashed Dream 9

Level: 1

Sequentially unleash Rainblade 3 times and Stygian Resurge 1 time, dealing Lightning DMG up to of Acheron’s ATK to a single target enemy, as well as Lightning DMG up to of Acheron’s ATK to other targets.

Rainblade:
Deals Lightning DMG equal to of Acheron’s ATK to a single target enemy and removes up to 3 stacks of Crimson Knot from the target. When Crimson Knot is removed, immediately deals Lightning DMG equal to of Acheron’s ATK to all enemies. For every stack of Crimson Knot removed, the DMG Multiplier for this is additionally in creased, up to a maximum of .

Stygian Resurge:
Deals Lightning DMG equal to of Acheron’s ATK to all enemies and remove all Crimson Knots.
Crimson Knot cannot be applied to enemies during the Ultimate.

Acheron Talents

Enhance

Acheron Talent

Atop Rainleaf Hangs Oneness

Level: 1

When Slashed Dream reaches 9 point(s), the Ultimate can be activated. During the Ultimate, reduces enemies’ Toughness regardless of Weakness Types and reduces all enemies’ All-Type RES by , lasting until the end of the Ultimate.

When any unit inflicts debuffs on an enemy target while using their ability, Acheron gains 1 point of Slashed Dream and inflicts 1 stack of Crimson Knot on the target. If debuffs are inflicted on multiple targets, then the 1 stack of Crimson Knot will be inflicted on the enemy target with the most Crimson Knot stacks. This effect can only trigger once per every ability usage.

After an enemy target exits the field or gets defeated by any unit while Acheron is on the field, their Crimson Knot stacks will be transferred to the enemy target with the most Crimson Knot stacks on the whole field.

Acheron Technique

Quadrivalent Ascendance

Acheron Technique

Immediately attacks the enemy, and gains Quadrivalent Ascendance at the start of every wave, dealing Lightning DMG equal to 200% of Acheron’s ATK to all enemies and reduces Toughness of all enemies irrespective of Weakness Types. When inflicting Weakness Break, triggers the Lightning Weakness Break effect.
Quadrivalent Ascendance: The next time Acheron uses her Ultimate, she gains 1 points of Slashed Dream and inflicts 1 stack(s) of Crimson Knot on a single random enemy.
If a normal enemy is attacked, they will be immediately defeated and will not enter combat. The Technique Point is not spent if the attack does not hit an enemy.

Acheron Traces

Red Ogre

First Tier

When battle starts, immediately gains 5 point(s) of Slashed Dream and applies 5 stack(s) of Crimson Knot to a random enemy. When Slashed Dream reaches its upper limit, for every point of Slashed Dream that exceeds the limit, gains 1 stack of Quadrivalent Ascendance. Increases the maximum stackable count for Quadrivalent Ascendance to 3.

Second Tier (Ascension 2)

Thrid Tier (Ascension 3)

Fourth Tier (Ascension 3)

The Abyss

First Tier

When there are 1 or 2 Nihility characters other than Acheron in the team, the DMG dealt by Acheron’s Basic ATK, Skill, and Ultimate increases to 115% or 160% of the original DMG respectively.

Second Tier (Ascension 4)

Thrid Tier (Ascension 5)

Fourth Tier (Ascension 5)

Thunder Core

First Tier

When the Rainblade from Acheron’s Ultimate hits enemy targets with Crimson Knot, her DMG increases by 30%, stacking up to 3 time(s) and lasting for 3 turn(s). And when Stygian Resurge triggers, additionally deals DMG for 6 times. Each time deals Lightning DMG equal to 25% of Acheron’s ATK to a single random enemy and is viewed as part of the Ultimate DMG.

Second Tier (Ascension 6)

Thrid Tier (Lv. 75)

Other Traces

First Tier (Lv. 1)

Second Tier (Lv 80)

Acheron Max Trace Lv Ascension Materials

Acheron Eidolon

Silenced Sky Spake Sooth

Acheron Eidolon Level 1

CRIT Rate increases by 18% when dealing DMG to debuffed enemies.

Mute Thunder in Still Tempest

Acheron Eidolon Level 2

The number of Nihility characters required for the Trace “The Abyss” to achieve its highest possible effect is reduced by 1. When this unit’s turn starts, gains 1 point of Slashed Dream and inflicts 1 stack of Crimson Knot on the enemy with the most Crimson Knot stacks.

Frost Bites in Death

Acheron Eidolon Level 3

Ultimate Lv. +2, up to a maximum of Lv. 15.
Basic ATK Lv. +1, up to a maximum of Lv. 10.

Shrined Fire for Mirrored Soul

Acheron Eidolon Level 4

When enemy targets enter combat, makes them Vulnerable to the Ultimate DMG, increasing the amount of DMG they take from the Ultimate by 8%.

Strewn Souls on Erased Earths

Acheron Eidolon Level 5

Skill Lv. +2, up to a maximum of Lv. 15.
Talent Lv. +2, up to a maximum of Lv. 15.

Acheron Eidolon Level 6

Increases the All-Type RES PEN for the Ultimate DMG dealt by Acheron by 20%. The DMG dealt by Basic ATK and Skill will also be considered as Ultimate DMG and can reduce enemy toughness regardless of Weakness Types. When Weakness is broken, triggers the Lightning Weakness Break effect.