Kingdom Hearts Union χ
Kingdom Hearts Dark Road

Strength Boost (ability)

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For other uses, see Attack Boost (disambiguation).
"Strength Burst" redirects here. You may have been looking for Strength Burst II.

Strength Boost
(アタックアップ Atakku Appu?, lit. "Attack Up")
Status Attack KHUX.gif
Attributes Target Gauge Cost Damage
Power Upright Single 2 7★: x9.53
7★: 1 turn: ↑ STR by 1.
Speed Upright Single 2 7★: x9.53
7★: 1 turn: ↑ STR by 1.
Magic Upright Single 2 7★: x9.53
7★: 1 turn: ↑ STR by 1.
Power Upright All 3 7★: x6.76
7★: 1 turn: ↑ STR by 1.
Speed Upright All 3 7★: x6.76
7★: 1 turn: ↑ STR by 1.
Strength Boost II
(アタックアップⅡ Atakku Appu II?, lit. "Attack Up II")
Attributes Target Gauge Cost Damage
Power Upright Single 3 7★: x9.53
7★: 1 turn: ↑ STR by 2.
Magic Upright Single 3 7★: x9.53
7★: 1 turn: ↑ STR by 2.
Speed Upright Single 3 7★: x9.53
7★: 1 turn: ↑ STR by 2.
Strength Boost Cost↓
(アタックアップeco Atakku Appu eco?, lit. "Attack Up eco")
Attributes Target Gauge Cost Damage
Power Upright Single 1 7★: x9.53
7★: 1 turn: ↑ STR by 1.
Strength Boost III
(アタックアップⅢ Atakku Appu III?, lit. "Attack Up III")
Attributes Target Gauge Cost Damage
Power Upright All 6 7★: x6.85
7★: 1 turn: ↑ U-STR & STR by 3.
Strength Boost III Cost↓
(アタックアップⅢeco Atakku Appu III eco?, lit. "Attack Up III eco")
Attributes Target Gauge Cost Damage
Magic Upright All 3 7★: x6.76
7★: 1 turn: ↑ U-STR & STR by 3.

Strength Burst
(アタックアップEX Atakku Appu EX?, lit. "Attack Up EX")
Status Attack KHUX.gif
Attributes Target Gauge Cost Damage
Speed Upright All 3 5★: x1.36
5★: Raises strength by 1 tier for 1 turn. Slightly recovers HP.
Strength Burst & Esuna
(アタックアップ&エスナEX Atakku Appu & Esuna EX?, lit. "Attack Up & Esuna EX")
Attributes Target Gauge Cost Damage
Speed Upright All 4 7★: x6.79
7★: 1 turn: ↑ STR by 1. HP recovery LV 2. Cures own status ailments.
Strength Burst III
(アタックアップⅢEX Atakku Appu III EX?, lit. "Attack Up III EX")
Attributes Target Gauge Cost Damage
Power Upright Single 3 7★: x9.53
7★: 1 turn: ↑ U-STR & STR by 3. HP recovery LV 3.
Attack Boost
(アタックアップ Atakku Appu?, lit. "Attack Up")
Attack Boost KHDR.gif
Strength +2 for 10s. Stacking Cards does not increase value. Can be applied more than once.
Color Type Element Power
Light Red Support Non-element 0
Attack Boost 1[1]
(アタックアップ Atakku Appu?, lit. "Attack Up")
Strength +1 for 10s. Stacking Cards does not increase value. Can be applied more than once.
Color Type Element Power
Light Blue Sub-ability — —
Attack Boost 2[2]
(アタックアップ Atakku Appu?, lit. "Attack Up 2")
Strength +2 for 10s. Stacking Cards does not increase value. Can be applied more than once.
Color Type Element Power
Light Red Sub-ability — —
Dark Green Sub-ability — —
Dark Red Sub-ability — —
Light Green Sub-ability — —
Light Blue Sub-ability — —

Strength Boost, also called Strength Burst and Attack Boost, is a series of techniques introduced in Kingdom Hearts Union χ. It allows the user to raise their strength.

Mechanics[edit]

Kingdom Hearts Union χ[edit]

Strength Boost is a special attack that targets a single enemy. It costs 2 special attack gauges to perform.

Special attack Rarity Base • •• ••• •••• ••••• Hits
Strength Boost +2 3★ x1.39 x1.41 1
Strength Boost +3 4★ x1.41 x1.43 x1.47 1
Strength Boost +4 5★ x1.43 x1.47 x1.51 x1.55 1
Strength Boost +5 6★ x1.47 x1.51 x1.55 x1.59 x1.63 x1.67 1
Strength Boost +6 7★ — — — — — x9.53 1

Special attack Player Buff Target Debuff Duration
+2-6 +2-6
Strength Boost Strength +1 — 1 turn

A variation of Strength Boost is a special attack that targets all enemies, and costs 3 special attack gauges to perform.

Special attack Rarity Base • •• ••• •••• ••••• Hits
Strength Boost +5 6★ x1.40 x1.44 x1.48 x1.52 x1.56 x1.60 1
Strength Boost +6 7★ — — — — — x6.76 1

Special attack Player Buff Target Debuff Duration
+5-6 +5-6
Strength Boost Strength +1 — 1 turn

Strength Boost Cost↓ is a special attack that targets a single enemy. It costs 1 special attack gauge to perform.

Special attack Rarity Base • •• ••• •••• ••••• Hits
Strength Boost Cost↓ +5 6★ x1.47 x1.51 x1.55 x1.59 x1.63 x1.67 1
Strength Boost Cost↓ +6 7★ — — — — — x9.53 1

Special attack Player Buff Target Debuff Duration
+5-6 +5-6
Strength Boost Cost↓ Strength +1 — 1 turn

Strength Boost II is a special attack that targets a single enemy. It costs 3 special attack gauges to perform.

Special attack Rarity Base • •• ••• •••• ••••• Hits
Strength Boost II +4 5★ x1.43 x1.47 x1.51 x1.55 1
Strength Boost II +5 6★ x1.47 x1.51 x1.55 x1.59 x1.63 x1.67 1
Strength Boost II +6 7★ — — — — — x9.53 1

Special attack Player Buff Target Debuff Duration
+4-6 +4-6
Strength Boost II Strength +2 — 1 turn

Strength Boost III is a special attack that targets all enemies. It costs 6 special attack gauges to perform.

Special attack Rarity Base • •• ••• •••• ••••• Hits
Strength Boost III +4 5★ x1.45 x1.49 x1.53 x1.57 1
Strength Boost III +5 6★ x1.49 x1.53 x1.57 x1.61 x1.65 x1.69 1
Strength Boost III +6 7★ — — — — — x6.85 1

Special attack Player Buff Target Debuff Duration
+4-5 +6 +4-6
Strength Boost III Strength +3 Strength +3
Upright-based strength +3 		— 1 turn

Strength Boost III Cost↓ is a special attack that targets all enemies. It costs 3 special attack gauges to perform.

Special attack Rarity Base • •• ••• •••• ••••• Hits
Strength Boost III Cost↓ +5 6★ x1.40 x1.44 x1.48 x1.52 x1.56 x1.60 1
Strength Boost III Cost↓ +6 7★ — — — — — x6.76 1

Special attack Player Buff Target Debuff Duration
+5 +6 +5-6
Strength Boost III Cost↓ Strength +3 Strength +3
Upright-based strength +3 		— 1 turn

Strength Burst is a special attack that targets all enemies. It costs 3 special attack gauges to perform. It slightly restores the user's HP.

Special attack Rarity Base • •• ••• •••• ••••• Hits
Strength Burst +4 5★ x1.36 x1.40 x1.44 x1.48 1

Special attack Player Buff Target Debuff Duration
+4 +4
Strength Burst Strength +1 — 1 turn

Strength Burst & Esuna is a special attack that targets all enemies. It costs 4 special attack gauges to perform. It moderately restores the user's HP, and cures all status ailments.

Special attack Rarity Base • •• ••• •••• ••••• Hits
Strength Burst & Esuna +5 6★ x1.43 x1.47 x1.51 x1.55 x1.59 x1.63 1
Strength Burst & Esuna +6 7★ — — — — — x6.79 1

Special attack Player Buff Target Debuff Duration
+5-6 +5-6
Strength Burst & Esuna Strength +1 — 1 turn

Strength Burst III is a special attack that targets a single enemy.[3] It costs 3 special attack gauges to perform. It greatly restores the user's HP.

Special attack Rarity Base • •• ••• •••• ••••• Hits
Strength Burst III +5 6★ x1.47 x1.51 x1.55 x1.59 x1.63 x1.67 1
Strength Burst III +6 7★ — — — — — x9.53 1

Special attack Player Buff Target Debuff Duration
+5 +6 +5-6
Strength Burst III Strength +3 Strength +3
Upright-based strength +3 		— 1 turn

Kingdom Hearts Dark Road[edit]

In Kingdom Hearts Dark Road, Attack Boost is a support ability that raises Xehanort's strength by +2 for 10 seconds.

Attack Boost 1 is a sub-ability that raises Xehanort's strength by +1 for 10 seconds.

Attack Boost 2 is a sub-ability that raises Xehanort's strength by +2 for 10 seconds.

Learning Strength Boost[edit]

Kingdom Hearts Union χ[edit]

  • Strength Boost Cost↓ +5 is the special attack for medal 525: Nick Wilde[JP].
  • Strength Boost Cost↓ +6 is the special attack for medal 1235: Nick Wilde[JP].

Kingdom Hearts Dark Road[edit]

  • The Genie card has Attack Boost as its ability.
  • Eraqus can use Attack Boost.
  • The Key Art #2 card has Attack Boost 1 as its sub-ability.
  • The Cloud card has Attack Boost 2 as its sub-ability.
  • The Roxas card has Attack Boost 2 as its sub-ability.
  • The Marluxia card has Attack Boost 2 as its sub-ability.
  • The Larxene card has Attack Boost 2 as its sub-ability.
  • The Halloween Sora card has Attack Boost 2 as its sub-ability.
  • The Xemnas card has Attack Boost 2 as its sub-ability.
  • The Saïx card has Attack Boost 2 as its sub-ability.
  • The Sora & Riku card has Attack Boost 2 as its sub-ability.
  • The Key Art #8 card has Attack Boost 2 as its sub-ability.

Other appearances[edit]

Final Fantasy Brave Exvius[edit]

FFBE ability icon

In Final Fantasy Brave Exvius, Attack Boost is a passive ability learned by Young Xehanort (KHDR). It increases ATK, and increases equipment ATK and accuracy when a single weapon is equipped.

FFBE ability icon

Attack Boost+ is a passive ability learned by Young Xehanort (KHDR). It increases ATK, increases equipment ATK and accuracy when a single weapon is equipped, and increases equipment ATK when two one-handed weapons are equipped.

See also[edit]

Notes and references[edit]

  1. ^ Previously named "Attack Boost".
  2. ^ Previously named "Attack Boost+".
  3. ^ In the Japanese version, during the 12/17/16 - 12/19/16 Revival Special Draw, Player had a small chance of drawing a boosted version of Illustrated Kairi that has an all-target Special Attack.
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