HD Aqua
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 The only pupil of Master Eraqus to pass the Mark of Mastery exam.
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| Kana | アクア HD Ver | ||||||
| Romaji | Akua HD Ver | ||||||
| JP Set | 10 | ||||||
| EN Set | 3 | ||||||
| Class | Type | Attributes | |||||
| Event | Attack | Magic | Upright | ||||
| STR | DEF | Trait Slots | Spirit Points | ||||
| 4184 | 4146 | 1 | 15 / 18 | ||||
| Wind Barrage +4 | |||||||
| Deals 7 extremely powerful hits. | |||||||
| Damage (Base) | x2.90 | Target |  Random
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| Damage (3 dots) | x0 | Gauges | 1 | ||||
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 The only pupil of Master Eraqus to pass the Mark of Mastery exam.
| |||||||
| Kana | アクア HD Ver | ||||||
| Romaji | Akua HD Ver | ||||||
| JP Set | 10 | ||||||
| EN Set | 3 | ||||||
| Class | Type | Attributes | |||||
| Event | Attack | Magic | Upright | ||||
| STR | DEF | Trait Slots | Spirit Points | ||||
| 5396 | 5346 | 1 | 15 / 18 | ||||
| Wind Barrage +5 | |||||||
| Deals 9 extremely powerful hits. | |||||||
| Damage (Base) | x3.00 | Target | Random
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| Damage (5 dots) | x0 | Gauges | 1 | ||||
| Damage (Max) | x | SAB Tier |  3
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HD Aqua is an Event Attack Medal in Kingdom Hearts Unchained χ / Union χ. HD Aqua was announced on June 8, 2016 via the official Square Enix page, and was released the next day. HD Aqua was given away in JP to players who logged in during June 9 to June 20, 2016, and in NA to players who logged in during June 16 to June 23, 2016, as part of the KINGDOM HEARTS HD 2.8 Final Chapter Prologue promo.[1]