Editing Hydra

  |KH2battlefile=Desire for All That Is Lost KHIIHD.ogg

Sora must first attack the Hydra's main head. When the Hydra's HP is depleted to a certain point, he must use the Vanquish reaction command to remove the head, ending the first phase. After this is done, the Hydra buries its head in the sand, causing three more heads to sprout out from underground in various locations, starting the second phase. By teaming up with Phil, Sora can use the Phil One-Two and Urninator reaction commands to immobilize them. Sora must defeat each of these heads and use Vanquish on them before they awaken.

In the third and final phase of this battle, the Hydra pulls its neck out of the ground and reveals a set of seven heads. Sora can team up with Pegasus and use the Pegasus Run reaction command to strike each head. Once the Hydra's HP has been depleted to 1, Sora need only use the Vanquish reaction command a final time to finish the monster off.

{{Atk|col=3|{{nihongo|'''Bite'''|かみつき|<br>Kamitsuki}}|Physical|x2.0<br>Hit 2+: x0.25|△|Bites while swinging its heads wildly left and right. Used in the second phase.}}

{{Atk|col=3|{{nihongo|'''Synchro Bite'''|一斉かみつき|<br>Issei Kamitsuki}}|Physical|x1.5<br>Hit 2+: x0.25|△|All seven heads bite near-simultaneously. Used in the third phase.}}

{{Atk-m|col=3|{{nihongo|'''Bite Combo'''|連続かみつき|<br>Renzoku Kamitsuki}}|(Bite)|Physical|x1.5<br>Hit 2+: x0.25|△|Bites repeatedly, then swings heads downward. Used in the third phase.||(Downswing)|Physical|x1.0<br>Hit 2+: x0.25|△}}

{{Atk|col=3|{{nihongo|'''Tail Attack'''|シッポ攻撃|<br>Shippo Kōgeki}}|Physical|x1.5<br>Hit 2+: x0.5|△|Sweeps wide with tails. Used in the first and third phases.}}

{{Atk|col=3|{{nihongo|'''Dark Servant'''|暗黒のしもべ|<br>Ankoku no Shimobe}}|Dark|x0.75|△|Brings forth demon-like orbs from the floor. Used in the first and third phases.}}

{{Atk|col=3|{{nihongo|'''Hades Flame'''|冥界の炎|<br>Meikai no Honō}}|Fire|x0.5|X|Generates pale, lightning-like flames among empty areas. Used in the first and third phases.}}

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{{rc|{{nihongo|'''Vanquish'''|バニッシュ|<br>Banisshu}}|—|—|Can be used when approaching the Hydra's body or head (if the individual head is at 1HP) while it is stunned.<br>Destroy the Hydra's head. Ends the battle when used in its third phase when the Hydra's HP is at 1.}}

{{rc|{{nihongo|'''Phil One-Two'''|フィルアタック|<br>Firu Atakku|lit. "Phil Attack"}}|—|—|Can be used when on the Hydra's back during the second phase.<br>Phil throws an urn into the air.}}

{{rc|{{nihongo|'''Urninator'''|バレットプレス|<br>Baretto Puresu|lit. "Bullet Press"}}|—|—|Can be used after using Phil One-Two.<br>Slam the urn into the Hydra's back, after which all heads will be temporarily incapacitated. This also greatly delays the restoration of another head.}}

{{rc|{{nihongo|'''Pegasus Run'''|ペガサスライド|<br>Pegasasu Raido|lit. "Pegasus Ride"}}|—|—|Can be used when the Hydra uses Bite Combo during its third phase.<br>Hop on Pegasus's back and fly around the Hydra's heads.}}

{{rc|{{nihongo|'''Attack'''|たたかう|<br>Tatakau}}|Physical|x2.0|Can be used when near the Hydra's heads after using Pegasus Run.<br>Slash at the Hydra's heads. Attack appears seven times. Cannot reduce the Hydra's HP to 1.}}

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