Extension: Polyphasic Excitation is the 5th stage of the Energy Amplifier Lemma event in Genshin Impact 4.8. See how to get 5000 points in Stage 5, along with the best strategies, teams, and amplifiers here!

Energy Amplifier Lemma Stage Guides
Stage 1	Stage 2	Stage 3
Stage 4	Stage 5	Stage 6

How to Beat Extension: Polyphasic Excitation Stage 5

Best Teams for Stage 5

First Round
Neuvillette	Furina	Charlotte	Lynette
Neuvillette	Layla	Fischl	Noelle
Second Round
Clorinde	Kazuha	Nahida	Fischl
Lynette	Collei	Xingqiu	Shinobu
Third Round
Wanderer	Faruzan	Yun Jin	Zhongli
Heizou	Faruzan	Bennett	Xiangling

For Stage 5, try to have as much variety in elements as possible to take advantage of the possible 25% Elemental DMG boost before Effector buffs.

Teams like Hyperbloom and Overvape have the advantage here due to how many different elements those teams contain.

Best Effectors for Stage 5

First Round
Character Max HP +15% A teamwide tally will be increased by 1/2/2 stacks respectively after a character's Normal, Charged, or Plunging Attacks hit an opponent. Each stack of the tally grants all party members a 7% All Elemental DMG Bonus for 4s. Can be triggered up to once every 0.2s, max 8 stacks. After a Character triggers an Elemental Reaction on an opponent, the All Elemental RES of that opponent is decreased by 100% for 4s.
Second Round
Character Elemental Mastery +80 After a character triggers an Elemental Reaction, all party members gain 32 Elemental Mastery and a 6.5% All Elemental DMG Bonus for 4s. Can be triggered up to once every 1s, max 5 stacks. After a Character triggers an Elemental Reaction on an opponent, the All Elemental RES of that opponent is decreased by 100% for 4s.
Third Round
Character ATK +15% After a character's Elemental Skill or Elemental Burst hits an opponent, the DMG dealt by the Elemental Skills and Elemental Bursts of all party members increases by 12% for 8s. Can be triggered up to once every 0.2s, max 5 stacks. After a Character triggers an Elemental Reaction on an opponent, the All Elemental RES of that opponent is decreased by 100% for 4s.

Round 1 Effectors

Round 1's Effectors are built purely for Neuvillette, as well as the team being centered around him and his damage.

The harder he hits against the enemy, the faster you rack up points, hence the increases to HP, the buffs to Normal and Charged Attacks, and the Elemental RES shred against the enemy.

Round 2 Effectors

Round 2's Effectors are made with a team like Hyperbloom or Quicken in mind, as more Elemental Mastery aids in providing more damage either using Hyperbloom Cores, or Spread/Aggravate damage.

Round 3 Effectors

Round 3 focuses on enhancing the Elemental DMG that the team can cause due to the main damage dealers of the team being Catalyst users and off-Field damage dealers.

Obtain a High Score of 5000

As with the other challenges, work your way up to 5000 points over the course of the challenge.

Round 1 and 2 in particular are full of fodder units that can be easily cleared to reach the 5000 point goal.

Hit as Many Targets as you Can in the First Round

The first round features plenty of opponents that are clumped up together, allowing for easy hits with an AoE unit or Neuvillette's Charged Attacks.

Use this to your advantage to clear wave after wave quickly to rack up as many points as possible.

Use Strong Elemental Reactions in the Second Round

The second round contains slightly tougher opponents that cannot be crowd-controlled as easily, but are still susceptible to being grouped up due to how they fight.

Make sure to bring strong damage that either specializes in AoE or is able to hit opponents from afar.

All-In on Elemental Damage for the Third Round

Most of the enemies here do not spawn in the same volume as the previous two rounds, making strong Elemental Damage the main choice here.

Focus on dealing with waves as fast as possible by unloading strong attacks such as Heizou's Elemental Skill or Wanderer's flurry of attacks.

Extension: Polyphasic Excitation Stage 5 Event Information

Trial Characters

Extension: Polyphasic Excitation Trial Characters
Neuvillette	Dehya	Shinobu

For Stage 5, you will be provided the trial characters Neuvillette, Dehya, and Shinobu.

However, if you personally own these units, feel free to use them over the trial ones as yours may be better built and equipped for the challenge!

Disorder and Effectors

Ley Line Disorder

Effectors

Primary Effectors
Character ATK +15% Character Elemental Mastery +80 Character Max HP +15% Character Energy Recharge +30% Character DEF +30%
Secondary Effectors
When a character is protected by a shield, all party members gain a 50% All Elemental DMG Bonus. When a character receives healing, all party members gain a 50% All Elemental DMG Bonus for 4s. After a character's Elemental Skill or Elemental Burst hits an opponent, the DMG dealt by the Elemental Skills and Elemental Bursts of all party members increases by 12% for 8s. Can be triggered up to once every 0.2s, max 5 stacks. A teamwide tally will be increased by 1/2/2 stacks respectively after a character's Normal, Charged, or Plunging Attacks hit an opponent. Each stack of the tally grants all party members a 7% All Elemental DMG Bonus for 4s. Can be triggered up to once every 0.2s, max 8 stacks. After a character triggers an Elemental Reaction, all party members gain 32 Elemental Mastery and a 6.5% All Elemental DMG Bonus for 4s. Can be triggered up to once every 1s, max 5 stacks.
Resonant Effectors
Character CRIT Rate +30%, CRIT DMG +100%. After an opponent is hit by a Character's attacks, the DEF of that opponent is decreased by 75% for 4s. After a Character triggers an Elemental Reaction on an opponent, the All Elemental RES of that opponent is decreased by 100% for 4s. When a Character's attack hits an opponent, summon a vortex at that opponent's location that continuously pulls in nearby opponents. It lasts for 6s and this effect may be triggered up to once every 10s. While the vortex is active, all nearby Characters gain a 100% All Elemental DMG Bonus.

Stage 5 List of Enemies

First Round Enemies

First Round Enemies
Large Overgrown Breacher Primus
Whirling Pyro Fungus
Winged Dendroshroom
Recon Log Mek
Assault Specialist Mek
Geological Survey Mek
Suppression Specialist Mek
Whirling Electro Fungus

Second Round Enemies

Second Round Enemies
Hydro Hilichurl Rogue
Blazing Axe Mitachurl
Geological Survey Mek
Ruin Guard
Ruin Scout
Construction Specialist Mek
Anemo Hilichurl Rogue
Crackling Axe Mitachurl

Third Round Enemies

Third Round Enemies
Ruin Drake - Earthguard
Ruin Grader
Eremite - Sunfrost
Eremite - Daythunder
Ruin Destroyer
Ruin Scout

Part of Energy Amplifier Lemma Event

Extension: Polyphasic Excitation is Stage 5 of the Energy Amplifier: Lemma event, where players must form teams of three to partake in rounds of combat to obtain rewards such as Primogems, EXP Materials, and Weapon Ascension Materials!

Energy Amplifier: Lemma serves as a continuation of the Energy Amplifier event that debutted back in Version 1.5!

Energy Amplifier Lemma 4.8 Rerun Event Guide

Extension: Polyphasic Excitation Stage 5 Rewards

Total Extension: Polyphasic Excitation Rewards

Objective	Rewards
Obtain a stage score of 500	Primogem x40 Sublimation of Pure Sacred Dewdrop x3 Mystic Enhancement Ore x4
Obtain a stage score of 2000	Primogem x30 Hero's Wit x2 Mystic Enhancement Ore x4
Obtain a stage score of 5000	Mora x20000 Hero's Wit x2 Mystic Enhancement Ore x2

Genshin Impact Related Guides

Energy Amplifier Event Guide

All Energy Amplifier Events

All Energy Amplifier Events
Initiation (1.5)	Fruition (2.3)	Lemma (4.8)

Energy Amplifier: Lemma Stage Guides

Energy Amplifier Lemma Stages
1 - Interference: Overgrowth	2 - Validation: Torrential Tide	3 - Observation: Soaring Will
4 - Collection: High-Energy Elements	5 - Extension: Polyphasic Excitation	6 - Exceedance: Resonance Amplification

Other Energy Amplifier Guides

2.3 Fruition Stage Guides

1.5 Initiation Stage Guides

All Twisted Realm Domain Guides
Domain of Deceit	Domain of Furious Thunder
Domain of Chaos	Domain of Heresy

Energy Amplifier Quest Guides

Energy Amplifier Initiation Quest Guide

All Genshin Impact Events

List of Current & Upcoming Events