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Type Icon Name SP Required Description
A Water Boost 1 Water Boost 1 50 At start of combat, if unit's HP ≥ foe's HP+3, grants Res+2 during combat.
Water Boost 2 Water Boost 2 100 Water Boost 1 At start of combat, if unit's HP ≥ foe's HP+3, grants Res+4 during combat.
Water Boost 3 Water Boost 3 200 Water Boost 2 At start of combat, if unit's HP ≥ foe's HP+3, grants Res+6 during combat.
No restrictions.

Available as a Sacred Seal.

Notes[ | ]

  • The stat increase that can be applied by Water Boost is considered a temporary buff.
  • Water Boost compares current HP between units to apply the temporary buff.

List of owners[ | ]

UnitSkill chain
Berkut Prideful Prince Face FC
Water Boost 1
★
Water Boost 2
★
Water Boost 3
★
Byleth Frosty Professors Face FC
Water Boost 1
★
Water Boost 2
★
Water Boost 3
★
Fireflood Boost 3
★
Ginnungagap Ruler of Nihility Face FC
Water Boost 1
★
Water Boost 2
★
Water Boost 3
★
Fireflood Boost 3
★
Mustafa Plegian Champion Face FC
Water Boost 1
★
Water Boost 2
★
Water Boost 3
★
Ymir Seasons of Life Face FC
Water Boost 1
★
Water Boost 2
★
Water Boost 3
★
Fireflood Boost 3
★

* Alfonse Prince of Askr Face FC Alfonse: Prince of Askr, Sharena Princess of Askr Face FC Sharena: Princess of Askr, Anna Commander Face FC Anna: Commander, and Forma units cannot be used for skill inheritance or turned into combat manuals.
** Rearmed Rearmed and Attuned Attuned Heroes cannot be used for normal skill inheritance or turned into combat manuals after using their Arcane/Elite Inheritance unless their Arcane/Elite Inheritance is restored via merges.

Availability[ | ]

Summoning events

Start End Event Skill
2020-06-05 2020-06-30 Book IV Mid: Mirabilis and More Water Boost 3
2023-07-07 2023-08-07 Summer Firsts Water Boost 3
2023-11-17 2023-12-07 Attuned Nino & Ginnungagap Water Boost 3
2023-11-22 2023-12-21 Focus: Double Special Heroes Water Boost 3
2023-12-14 2024-01-14 Holiday Lessons Water Boost 3
2024-01-30 2024-03-05 Special Hero Summon (Year 7) Water Boost 3
2024-02-25 2024-03-05 7th Anniversary Special Focus 3 Water Boost 3

Distributed units

Combat Manuals

Start End Hero Currency
2021-04-05T03:00:00Z 2021-05-28T06:59:59Z Mustafa: Plegian Champion Divine Code: Ephemera 4

Seal acquired from[ | ]

Tempest Trials reward[ | ]

Sacred Seal Forge[ | ]

In other languages[ | ]

Language Name
Japanese 生命の静水
German Wasserschub
Spanish (Europe) Hidrovitalidad
Spanish (Latin America) Hidrovitalidad
French Boost apaisant
Italian Impulso acqua
Traditional Chinese (Taiwan) 生命靜水
Portuguese Hidrovital

See also[ | ]

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