Eternal Session (エターナルセッション, Etānaru Sesshon)
A Limit Command that unleashes Riku and Sora's joint attack, Session. Consumes all of Sora's MP.
Attack	Element	Power	Drive Value	Deflect	Finishing Blow
Session	Physical	x0.01	—	—	O
Last Saber	Physical	x0.01	—	—	O
Dark Cannon	Physical	x0.01	—	—	O
XIII Blades	Physical	x0.01	—	—	O
Master Hearts	Physical	x0.01	—	—	O
All's End	Neutral	x0.01 Final hit: x10.0	—	—	X
AP Cost	3	MP Cost	All remaining	Limit Gauge	5.1

Eternal Session (エターナルセッション, Etānaru Sesshon)
Attributes		Target	Gauge Cost	Damage
Speed	Upright	All	1	7★: x6.98 - 8.56 SN: x13.09 - 15.47 SN++: x13.51 - 19.25
6★: Lowers targets' DEF & S-DEF by 4 tiers for 1 turn. Inflicts more damage the higher your HP. 7★: 1 turn: ↑ U-STR by 3, ↓ targets' DEF & S-DEF by 4. Inflicts more damage the higher your HP. SN: 1 turn: ↑ U-STR 15, STR 10, SP ATK B +170%, ↓ targets' DEF 10, S-DEF 15. Count +3. Damage+: Higher HP. SN++: 1 turn: Medal STR +10000, self [↑ STR, U- & S-STR 15], targets [↓ DEF, U- & S-DEF 15], SP ATK B +220%. Count +3. Damage+: Higher HP. Ignores targets' attributes.

"You're gonna lose it all!"

—Riku, when using All's End

Eternal Session is a technique introduced in Kingdom Hearts II. Together, Sora and Riku can use the joint attack, Session.

Mechanics

Kingdom Hearts II

In Kingdom Hearts II, Eternal Session is an action ability exclusive to Riku. It costs 3 AP to equip and all of Sora's MP to use. The limit begins with Session (セッション, Sesshon), in which Sora and Riku perform a rapid flurry of attacks. Then, Last Saber (ラストセイバー, Rasuto Seibā) becomes available in the Attack slot, in which Sora and Riku rapidly stab an enemy with their Keyblades, and Dark Cannon (ダークカノン, Dāku Kanon) can be used as a Reaction Command, allowing the duo to fire a barrage of dark orbs at enemies. Afterwards, Sora and Riku turn their backs toward each other, and the next phase of the Limit begins. Overriding the Attack command, XIII Blades (XIIIソード, XIII Sōdo, lit. "XIII Swords") has the duo linking arms and summoning thirteen swords to perform a spinning slash attack. After using Last Saber or Dark Cannon twice, the next technique, Master Hearts (マスターハーツ, Masutā Hātsu), is used automatically and involves Sora and Riku coating their Keyblades in an aura. Riku is handed Sora's Keyblade and slashes at enemies with it alongside his own, before passing both Sora's Keyblade and Way to the Dawn to Sora so he can do the same. After XIII Blades or Master Hearts is used twice, All's End (オールオーバー, Ōru Ōbā, lit. "All Over"), can be used, in which Sora and Riku's Keyblades float side-by-side in energy orbs that reel in enemies before exploding. The two then bump their fists together after the final attack has finished. During the limit, Sora can move around freely. The limit can be cancelled early through the Stop (やめる, Yameru) command in the Limit slot.

Kingdom Hearts Union χ

In Kingdom Hearts Union χ, Eternal Session is a special attack that targets all enemies. It costs 1 special attack to perform. It inflicts more damage the higher the user's HP. Eternal Session +7 and +8 raise enemy counters by 3, and Eternal Session +8 also ignores target attributes.

Special attack	Rarity	Base	•	••	•••	••••	•••••		Hits
Eternal Session +5	6★	x1.62 - 3.03	x1.66 - 3.10	x1.70 - 3.18	x1.74 - 3.25	x1.78 - 3.33	x1.82 - 3.40		1
Eternal Session +6	7★	—	—	—	—	—	x6.98 - 8.56		1
Eternal Session +7	SN SN+	—	—	—	—	—	x13.09 - 15.47		1
Eternal Session +8	SN++	—	—	—	—	—	x13.51 - 19.25		1

Special attack	Player Buff				Target Debuff			Duration
	+5	+6	+7	+8	+5-6	+7	+8
Eternal Session	—	+3	+10  +15  +170%	+10000  +15  +15  +15  +220%	-4  -4	-10  -15	-15  -15  -15	1 turn

Learning Eternal Session

Kingdom Hearts II

• Riku has Eternal Session as a default ability.

Kingdom Hearts Union χ

• Eternal Session +5 is the special attack for medal 800: Illustrated KH II Sora & Riku [EX].
• Eternal Session +6 is the special attack for medal 1375: Illustrated KH II Sora & Riku [EX].
• Eternal Session +7 is the special attack for medals 1375: SN - Illus. KH II Sora & Riku and 1375: SN+ - Illus. KH II Sora & Riku.
• Eternal Session +8 is the special attack for medal 1375: SN++ - Ill. KH II Sora & Riku.

Other appearances

Kingdom Hearts 3D: Dream Drop Distance

During the game's opening FMV, Sora and Riku are seen using the Master Hearts portion of Eternal Session against Xemnas's Multi Shot attack.

Final Fantasy Record Keeper

Master Hearts appears in Final Fantasy Record Keeper as one of Sora's Soul Breaks, learned through the Two Become One (KH) Keyblade. It allows him to deliver fifteen ranged physical fire, lightning, ice, and non-elemental attacks to an enemy, temporarily increase his fire, lightning, and ice levels by 3, gain Awoken Spellblade Mode, increase his Cap Breal level by 1, and causes every third spellblade ability he uses to trigger the follow-up attack Blitz.

Dark Cannon appears in Final Fantasy Record Keeper as one of Riku's Soul Breaks, learned through the KINGDOM HEARTS II Riku (KH) Light Armor. It allows him to deliver fifteen ranged physical dark and non-elemental attacks to an enemy, temporarily infuse him with the power of the dark, gain Awoken Darkness Mode, increase his Cap Breal level by 1, and causes every darkness ability he uses to trigger the follow-up attack Dark Barrage.

• Kingdom Hearts II abilities
• Kingdom Hearts Union χ special attacks