Common Keys

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Common Keys (also called Universal Keys) are equipped on T-Dolls to provide stat boosts and extra effects. Unlike Fixed Keys (also called Exclusive Keys), Common Keys can be equipped on any T-Doll, even if they were unlocked as part of a specific T-Doll's enhancement.

Common Keys are obtained during events, by completing the Neural Helix of a T-Doll or by reaching Bond 5 with a T-Doll. They're equipped on the right side of the Key Regulation menu, while Fixed Keys are equipped on the left sidem and Expansion Keys and Affinity Keys in the center.

The Antiparallel update in CN and Deep Oblivion update in Global enabled Common Key Evolution.

Evolution

From the Key Regulation or Storeroom keys, purple and gold rarity keys can be Evolved, which is similar to weapon attachment calibration. By spending Universal Chain Keys and Sardis Gold, the stat boosts from a Common Key can be boosted up to 5%. One new stat can be unlocked for purple rarity Common Keys and two stats for gold rarity keys by spending Universal Chain Keys and Transcription Conductors VI. These bonus stats will start at 0.5% buff and need to be upgraded separately.

Universal Chain Keys are obtained from the weekly Platoon and Boss Fight shops, from gift boxes or from dismantling other Common Keys. Players should be careful with this last option since Common Keys are fairly rare items. Blue rarity Common Keys will yield 40 and Purple rarity Common Keys 100 . Gold rarity Common keys cannot be dismantled.

List

From Growth Stack

The Growth Stack permanent shop allows to buy one Common Key ECG Flutter (Attack Boost +3%, Health Boost +3%) for 150 every month. This is the only Common Key that can be obtained more than once, designating it as fodder for Evolution.

From Events

Name	Event	Effects
Heavy Metal	Sojourners of the Glass Island - Hazard Patrol	Crit Rate +3% Attack Boost +3%
Rubber Pig	Sojourners of the Glass Island - Wasteland Impact	Attack Boost +3% Health Boost +3%
The Force of Bravery	Sojourners of the Glass Island - Event Shop (Part 1)	Crit Rate +3% Attack Boost +3%
Fortress Gatekeeper (Warden's Wall)	Sojourners of the Glass Island - Event Shop (Part 1)	Attack Boost +2% Defense Boost +2%
Pixie Cape (Snow Fairy's Cape)	Sojourners of the Glass Island - Event Shop (Part 2)	Attack Boost +3% Defense Boost +3%
Delicious Canned Herring (Yummy Canned Herring)	Sojourners of the Glass Island - Event Shop (Part 2)	Attack Boost +2% Health Boost +2%
Teddy Bear Costume	Rhapsody Quartet - Event Shop	Attack Boost +3% Health Boost +3%
Caramel Overload	Rhapsody Quartet - Event Shop	Attack Boost +2% Defense Boost +2%
Vibrant Tremolo	Amidst Wings of Gray - Event Shop	Crit Rate +3% Attack Boost +3%
Reverberating Melody	Amidst Wings of Gray - Event Shop	Attack Boost +2% Health Boost +2%
Almighty Wish Machine	Halting Station - Event Shop	Attack Boost +3% Health Boost +3%
The Best Sword in the Elmo	Halting Station - Event Shop	Crit Rate +2% Attack Boost +2%
Demon King's Scales	Simulation Exercise (Stage 4) in 2025-02	Attack Boost +3% Defense Boost +3%
Black Tea Breve	Zucchero Café - Event Shop	Crit Rate +3% Attack Boost +3%
Ice Velvet Latte	Zucchero Café - Event Shop	Attack Boost +2% Defense Boost +2%
Fragrant Protection	Zucchero Café - A+ Rank Mission	Attack Boost +3% Health Boost +3%
Trustworthy Leader	Simulation Exercise (2025/03/26 to 2025/04/09) - Stage 4	Attack Boost +3% Defense Boost +3%
Tacit Lookout	Aphelion - Event Shop	Attack Boost +3% Crit Rate +3%
Absolute Elite	Aphelion - Event Shop	Attack Boost +2% Health Boost +2%
Canned Energy Drink	Aphelion - Event Shop	Attack Boost +3% Defense Boost +3%
Eye of the Assaulter	Aphelion - Event Shop	Attack Boost +2% Crit Rate +2%
Enhanced Battery	Aphelion - Complete a game in Pathforger Tycoon	Attack Boost +3% Health Boost +3%
Silent Executor	Escape from Cyborg - Event Shop	Crit Rate +2% Attack Boost +2%
Hidden Gamebreaker	Escape from Cyborg - Event Shop	Attack Boost +3% Health Boost +3%
Eruption in Vigilance	Simulation Exercise (2025/05/07 to 2025/05/21) - Stage 5	Attack Boost +3% Defense Boost +3%
Path of Danceseeking	Silvered Whispers - Event Shop	Attack Boost +3% Defense Boost +3%
Operation Troupe Poacher	Silvered Whispers - Minigame Reward	Attack Boost +3% Health Boost +3%
Righteous Aid	Echo of Dawn - Event Shop	Attack Boost +3% Health Boost +3%
Stoic Joker	Echo of Dawn - Event Shop	Attack Boost +2% Defense Boost +2%
Ranger's Spirit	Simulation Exercise (2025/06/18 to 2025/07/02) - Stage 5	Attack Boost +3% Crit Rate +3%
Hundred Percent Motivation	Simulation Exercise (2025/07/30 to 2025/08/13) - Stage 5 Simulation Exercise (2025/09/10 to 2025/09/24) - Stage 5	Attack Boost +3% Crit Rate +3%
Careful Guarding	Interstice of Reminiscence - Minigame Reward	Attack Boost +3% Defense Boost +3%
Balanced Defense and Offense	Interstice of Reminiscence - Minigame Reward	Attack Boost +3% Defense Boost +3%
Seductive Angel	Simulation Exercise (2025/10/22 to 2025/11/05) - Stage 5	Attack Boost +3% Health Boost +3%
Family's Encouragement	Simulation Exercise (2025/12/03 to 2025/12/17) - Stage 5	Attack Boost +3% Health Boost +3%
Dog Lover	Play the minigame Dinergate, Jump! seven times during Deep Oblivion	Attack Boost +3% Defense Boost +3%
Looking To Future Strength	Simulation Exercise (2026/01/14 to 2026/01/28) - Stage 5	Attack Boost +3% Crit Rate +3%
Critical Singularity	Starry Project login event reward (2026/01/19 to 2026/02/04)	Attack Boost +3% Crit Rate +3%
Paradox Equation	Memory Puzzle minor event (2026/01/29 to 2026/02/19)	Attack Boost +3% Defense Boost +3%
Alpha's Duty	Simulation Exercise (2026/02/25 to 2026/03/11) - Stage 5	Attack Boost +3% Defense Boost +3%
Mechanized Exoskeleton	Corposant - Shopping Spree Stage 3	Attack Boost +3% Health Boost +3%
Brand New Agreement	Simulation Exercise (2026/04/08 to 2026/04/22) - Stage 5	Attack Boost +3% Crit Rate +3%
Folk Tale Lover	Antiparallel - Complete Soirée - Starlight Gala	Attack Boost +3% Health Boost +3%
Critical Singularity	Simulation Exercise (2026/05/20 to 2026/06/03) - Stage 5	Attack Boost +3% Crit Rate +3%

From Neural Helix

Name	T-Doll	Effects
Inductive Field	Andoris	Defense Boost +5.0% At the start of the turn, for every Electric debuff on the field, increases damage dealt by 5%, to a maximum of 10%. This effect lasts until the end of the round.
The Will to Fight for Favor	Belka	Attack Boost +5.0% Increases damage dealt by 10% if this unit expends mobility.
Essential Hot Beverages	Centaureissi	Health Boost +5.0% At the end of action, applies Heat Recovery to the closest allied unit without Heat Recovery. This effect has a 2-turn cooldown.
Shattering Stone and Silk	Daiyan	Crit Rate +5.0% At the start of the action, gains Movement Up I for 1 turn. This has a cooldown of 1 turn.
Artistic Inspiration	Dushevnaya	Attack Boost +5.0% For targets with mobility less than or equal to the user or that cannot move, increases Phase damage dealt by 10%.
Holmgang	Faye	Crit Rate +5.0% Physical damage taken by enemy units within 3 tiles is increased by 5%.
Might Makes Right	Jiangyu (GFL2)	Attack Boost +5.0% Damage dealt to enemies in Stability Break is increased by 10%.
Murderous Return	Klukai	Attack Boost +5.0% At the start of the turn, if the user's Confectance Index is full, the next instance of AoE damage inflicted by an active attack is increased by 10%.
Survival Instinct	Makiatto	Attack Boost +5.0% At the start of the action, if own HP is greater than 80%, reduces stability damage taken from attacks by 2 points. This can trigger at most once per turn.
Gaming Time	Mechty	Attack Boost +5.0% Basic attack damage is increased by 20%.
All Seeing Eye	Mosin-Nagant	Attack Boost +5.0% When this unit is under the effects of Insight, increases damage dealt by 7%.
Defender	Nikketa	Attack Boost +5.0% When this unit has a Hydro buff, critical rate is increased by 10%.
Brilliant Medal	Papasha	Attack Boost +5.0% Increases damage dealt by allied units' support skills (excluding self) by 10%. Can trigger at most once per turn.
Still Growing	Peri	Health Boost +5.0% When attacking the same enemy multiple times, phase damage dealt to it is increased by 10%.
All Points to Damage	Peritya	Crit Rate +5.0% If an active skill hits 2 or more enemy targets, damage dealt is increased by 7%.
Strategic Negotiation	Qiongjiu	Crit Rate +5.0% Increase damage dealt outside of the unit's own turn by 7%.
Delicious Cooking	Qiuhua	Crit Rate +5.0% When Out-of-Turn Attack deals Burn damage, the damage dealt is increased by 10%.
Hot Oil Protection	Sabrina	Defense Boost +5.0% When dealing targeted damage, applies Movement Down II to the target for 1 turn.
Meticulous Attention	Springfield	Health Boost +5.0% At the start of the turn, if stability is not full, gains Constant Stability Regen II for 1 turn.
Mission's Blessing	Suomi	Defense Boost +5.0% When HP drops below 80%, restore 15% of this unit's maximum HP and gain Defense Up III for 2 turns. Can trigger only once per battle.
Afterglow	Tololo	Attack Boost +5.0% When Confectance Index is below max, increases damage dealt by 7%.
Mangle	Ullrid	Crit Rate +5.0% If the enemy target's HP is not full before the attack, increase damage dealt to them by 7%.
Death Knell	Vector	Attack Boost +5.0% At the start of the turn, if any enemy unit has any Burn debuffs, attack is increased by 8%.
Heart Melting Strike	Vepley	Attack Boost +5.0% If the user's Mobility is greater than or equal to the target's, increases damage dealt by 7%.
Main Dancer's Might	Yoohee	Attack Boost +5.0% When dealing damage which contains Ammo attribute, damage dealt is increased by 10%.
Suona's Realm	Zhaohui	Crit Rate +5.0% At the start of the turn, increases the critical damage of the next active attack by 10%.
Overengineered Invention	Cheeta	Attack Boost +3.0% When using an active heal, there is a 50% chance to apply 1 random buff to the target for 1 turn.
Fabricated Life	Colphne	Health Boost +3.0% Before using a single target active heal, cleanses 1 random debuff from the target.
Sustained Endurance	Groza	Health Boost +3.0% When Shelter is active, this unit is immune to displacement for 1 time. Has a cooldown of 1 turn.
Art of Violence	Krolik	Crit Rate +3.0% If under the effects of a Burn buff, gains immunity to Frozen and Frigid, and increases damage by 5%.
Blazing Inferno	Ksenia	Health Boost +3.0% When applying a Burn buff, there is a 50% chance to apply 1 additional buff to the target for 1 turn.
Vulnerability Exploit	Littara	Crit Rate +3.0% Damage dealt to targets with defense debuffs is increased by 7%.
Hunting Trap	Lotta	Attack Boost +3.0% Increase damage dealt against enemy targets with movement debuffs by 7%.
Veteran's Wisdom	Nagant	Attack Boost +3.0% If the target's stability index is lower than this unit's, increase damage dealt to them by 7%.
Blessing of the Morning Star	Nemesis	Attack Boost +3.0% When this unit is under the effects of Insight, gain 3 additional tiles of movement after killing an enemy target.
Opening Fireworks	Sharkry	Crit Rate +3.0% If the unit has more than 1 buff, increase damage dealt by 7%.

From Bond

Name	T-Doll	Effects
Rain Nourishes in Silence	Andoris	Attack Boost +3% Health Boost +3% Defense Boost +3%
-	Belka	Crit Rate +3% Attack Boost +3% Health Boost +3%
Maid's Pride	Centaureissi	Attack Boost +3% Health Boost +3% Defense Boost +3%
Sweet Serenade	Daiyan	Crit DMG +3% Attack Boost +3% Health Boost +3%
Shining Memories	Dushevnaya	Crit Rate +3% Attack Boost 3% Health Boost +3%
The Line Between Life and Death	Faye	Crit Rate +3% Attack Boost +3% Health Boost +3%
Prank Prosecutor	Florence	Attack Boost +3% Health Boost +3% Defence Boost +3%
Rebellious Beat	Jiangyu (GFL2)	Crit DMG +3% Attack Boost +3% Health Boost +3%
Fly, Silver Wings	Klukai	Crit Rate +3% Crit DMG +3% Attack Boost +3%
Love So Sweet	Makiatto	Crit DMG +3% Attack Boost +3% Health Boost +3%
Deep Sleep	Mechty	Attack Boost +3% Health Boost +3% Defense Boost +3%
Heart of Gold	Mosin-Nagant	Crit Rate +3% Attack Boost +3% Health Boost +3%
Ally of Justice	Nikketa	Crit Rate +3% Crit DMG +3% Attack Boost +3%
Unbreakable Faith	Papasha	Attack Boost +3% Health Boost +3% Defense Boost +3%
-	Peri	Attack Boost +3% Health Boost +3% Defense Boost +3%
Cat's Relaxation	Peritya	Crit Rate +3% Crit DMG +3% Attack Boost +3%
Warm as Jade	Qiongjiu	Crit DMG +3% Attack Boost +3% Health Boost +3%
-	Qiuhua	Crit DMG +3% Attack Boost +3% Health Boost +3%
Dessert Time	Sabrina	Attack Boost +3% Health Boost +3% Defense Boost +3%
Tacit Vigil	Springfield	Attack Boost +3% Health Boost +3% Defense Boost +3%
Rock and Roll	Suomi	Attack Boost +3% Health Boost +3% Defense Boost +3%
Stardust's Whispers	Tololo	Crit DMG +3% Attack Boost +3% Health Boost +3%
Stress Ball Terminator	Ullrid	Crit DMG +3% Attack Boost +3% Health Boost +3%
Tragedy Preview	Vector	Crit Rate +3% Attack Boost +3% Health Boost +3%
Grand Debut	Vepley	Crit Rate +3% Crit DMG +3% Attack Boost +3%
Big Bright Shining Star	Yoohee	Attack Boost +3% Health Boost +3% Defense Boost +3%
Together We Shine	Zhaohui	Crit DMG +3% Attack Boost +3% Health Boost +3%
Genius' Luck	Cheeta	Attack Boost +3% Health Boost +3% Defense Boost +3%
Healing Treatment	Colphne	Attack Boost +3% Health Boost +3% Defense Boost +3%
Midnight Reflection	Groza	Attack Boost +3% Health Boost +3% Defense Boost +3%
Scorching Protection	Krolik	Crit Rate +3% Attack Boost +3% Health Boost +3%
Making Money	Ksenia	Attack Boost +3% Health Boost +3% Defense Boost +3%
Scribbled Thoughts	Littara	Crit Rate +3% Attack Boost +3% Health Boost +3%
New Sprout	Lotta	Crit Rate +3% Attack Boost +3% Health Boost +3%
Hat Trick	Nagant	Attack Boost +3% Health Boost +3% Defense Boost +3%
Soft Whispers	Nemesis	Crit DMG +3% Attack Boost +3% Health Boost +3%
Idol's Determination	Sharkry	Crit DMG +3% Attack Boost +3% Health Boost +3%