| Type | Icon | Name | SP | Required | Description |
|---|---|---|---|---|---|
| A | 
|
Duality | 300 | — | Grants Atk/Res+9. Grants weapon-triangle advantage against and inflicts weapon-triangle disadvantage on red, blue, and green foes during combat. Neutralizes effects that boost values along with weapon-triangle advantage or reduce values along with weapon-triangle disadvantage (Triangle Adept) on unit and foe. At start of combat, if unit's HP ≥ 25%, unit makes a guaranteed follow-up attack during combat. |
|
Duality+ | 300 | Duality | Grants Atk/Res+10. Grants weapon-triangle advantage against and inflicts weapon-triangle disadvantage on red, blue, and green foes during combat. Neutralizes effects that boost values along with weapon-triangle advantage or reduce values along with weapon-triangle disadvantage (Triangle Adept) on unit and foe. At start of turn, grants Special cooldown count-1 to unit and allies within 2 spaces of unit. Unit makes a guaranteed follow-up attack, deals +7 damage (including area-of-effect Specials; excluding Røkkr area-of-effect Specials), and reduces damage from foe's attacks by 7 during combat (excluding area-of-effect Specials). | |
| This skill can only be equipped by its original unit. | |||||
* Unused restrictions: No restrictions.
Effects[]
| Effects | Targets | Conditions |
|---|---|---|
 Duality | ||
| Permanent effects | ||
 Atk/Res+9 |  Unit | — |
| Combat effects | ||
 Weapon-triangle advantage | Unit |  Foe isn't Colorless |
| Weapon-triangle disadvantage | Foe | |
 Neutralizes weapon-triangleadvantage effects from skills | Unit & Foe | — |
 Guaranteed follow-up | Unit | Unit's HP ≥ 25% at start of combat |
 Duality+ | ||
| Permanent effects | ||
| Atk/Res+10 | Unit | — |
| Map effects | ||
 Special cooldown count-1 | Unit &  Allieswithin 2 spaces | At start of turn if an Ally iswithin 2 spaces |
| Combat effects | ||
| Weapon-triangle advantage | Unit | Foe isn't Colorless |
| Weapon-triangle disadvantage | Foe | |
| Neutralizes weapon-triangle advantage effects from skills | Unit & Foe | — |
| Guaranteed follow-up | Unit | |
 Boosts damage by 7before & during combat | ||
 Reduces damage by 7from Foe's attacks | ||
Notes[]
- Duality will stack with additional and altered weapon-triangle advantages and disadvantages from effects such as
Duality+, Raven tomes, and Time Traveler skills. - Duality does not boost values alongside an existing weapon-triangle advantage and thus is not affected by effects such as Duality+ or Cancel Affinity.
- See weapon-triangle for more information on weapon triangle advantage effects.
- Duality can neutralize weapon-triangle advantage & disadvantage boosting effects such as Triangle Adept or Ruby Sword+.
- Duality has no affect on effects that grant additional or altered weapon-triangle advantage(s) and/or disadvantage(s) such as Duality+, Raven Tomes, or Time Traveler skills.
- See weapon-triangle for more information on weapon triangle advantage effects.
- As a general rule, if a unit is both prevented from making, and guaranteed to make a follow-up attack, the effects cancel out, and the Spd difference decides instead (including effects that alter the Spd difference such as Frozen).
- A foe with effects such as Phys. Null Follow or Null Follow-Up will neutralize the guaranteed follow-up attack granted by Duality.
- Duality+'s cooldown count changing effect will not trigger if the unit is inflicted with False Start, unless False Start is removed by a skill such as Dream Deliverer.
- Cooldown count changes from skills that activate at the same time as Duality+ (at start of turn) are not considered in Duality+'s conditions.[1] Skills such as Infantry Pulse 4, Buffer 4, and Odd Pulse Tie 3 will have their effects stack.
- The damage boosting effect is a flat +7 damage that ignores the foe's Def or Res when calculating the damage boost, and can be reduced by damage reduction effects such as Gust, Atk/Spd Excel, and Dodge.
- Damage boosting effects stack additively, similar to flat damage-reduction effects and interactions related to the weapon-triangle, such as Triangle Adept and the weapon-triangle advantage boost.
- A foe equipped with Invincibility Seals will neutralize all sources of damage except from Røkkr area-of-effect Specials and the minimum 1 damage from Umbra Burst weapons.
- A foe equipped with Invincible Sister will neutralize all sources of damage during combat except for the minimum 1 damage from Umbra Burst weapons only once per Phase after it triggers.
- A foe equipped with Vengeful God will neutralize all sources of damage during combat except for the minimum 1 damage from Umbra Burst weapons only once per Phase after Miracle triggers if that foe's HP ≥ 25% at start of combat.
- For more information, see Damage calculation.
- Damage boosting effects stack additively, similar to flat damage-reduction effects and interactions related to the weapon-triangle, such as
- The flat damage-reduction effect is a flat -7 damage that is calculated after offensive Specials, damage boosting effects such as Arcane Lúin and Dominance, and "reduces damage by X%" effects such as Gust and Dodge.
- If a skill such as Miracle or Everliving Domain can trigger, the damage-reduction effect will not trigger and the user will still survive with only 1 HP.
- Umbra Burst weapons will always deal a minimum of 1 damage even if the foe is equipped with
Invincible Sister, 
Vengeful God, Invincibility Seals, or damage reduction effects. - Flat damage-reduction effects stack additively, similar to damage boosting effects and interactions related to the weapon-triangle, such as Triangle Adept and the weapon-triangle advantage boost.
- Flat damage-reduction effects cannot be neutralized or reduced only during combat by effects such as Share Spoils+ or Halves non-Special damage reduction.
- For more information, see Damage calculation.
- If a skill such as
List of owners[]
| Unit | Skill chain | |
|---|---|---|
 | Duality 5  | Duality+ 5 |
Availability[]
Summoning events
| Start | End | Event | Skill |
|---|---|---|---|
| 2022-10-31 | 2022-11-14 | Mythic Heroes - Arval | Duality+ |
| 2023-01-27 | 2023-02-10 | Focus: Double Mythic Heroes | Duality+ |
| 2023-04-28 | 2023-05-12 | Mythic Heroes - Nerþuz | Duality+ |
| 2023-07-28 | 2023-08-11 | Mythic Heroes - Freyr | Duality+ |
| 2023-10-31 | 2023-11-14 | Mythic Heroes - Veyle | Duality+ |
| 2024-03-29 | 2024-04-12 | Emblem Heroes - Ike: Of Radiance | Duality+ |
| 2024-08-30 | 2024-09-13 | Legendary Heroes - Shez | Duality+ |
| 2025-05-12 | 2025-05-26 | Legendary & Mythic Hero Remix 1 | Duality+ |
| 2025-10-11 | 2025-10-25 | Legendary & Mythic Hero Remix 1 | Duality+ |
Distributed units
- This skill is not available on any distributed units.
Combat Manuals
- This skill has not been available on any distributed Combat Manuals.
Trivia[]
- Duality+ grants weapon-triangle advantage against 1,096/1,387 units.
In other languages[]
| Language | Name |
|---|---|
| Japanese | 陰陽の法則 |
| German | Dualität |
| Spanish (Europe) | Dualidad |
| Spanish (Latin America) | Dualidad |
| French | Dualité |
| Italian | Dualismo |
| Traditional Chinese (Taiwan) | 陰陽法則 |
| Portuguese | Dualidade |