Game:Vexen

Vexen is fought as a boss in Kingdom Hearts: Chain of Memories, Kingdom Hearts Re:Chain of Memories, and Kingdom Hearts II Final Mix. First appearing to Riku in hopes of recruiting him to help accomplish his goals, Vexen instead was defeated and obtained valuable combat data he would later use to test Riku and even Sora in the form of the Riku Replica. His "product of pure research" dubbed a failure by Marluxia, Vexen later appeared before Sora to prove himself and his strength to his traitorous fellow Nobody. He then craftily lured Sora to the memory-based Twilight Town for a second battle, hoping to ruin the rebellious Marluxia, Axel, and Larxene's plans to take over the Organization at the same time. This attempt led to Vexen's own elimination, however, at Axel's hand, the Nobody appearing to Sora a year after these events transpired as both an Absent Silhouette and a Data Rematch.

First battle
At the beginning of the battle, Sora should immediately begin to attack Vexen, but one must also take note of the fact that he will Guard against all frontal attacks and must be hit from behind. One also should be careful not to abuse Sleights, as this will rapidly deplete the number of usable cards in Sora's deck, possibly making Vexen's attacks harder or nearly impossible to Card Break. Any Friend Cards should be saved for Sleights or singular usage if they are of high value. The player may wish to bring Enemy Card Oogie Boogie, Captain Hook, Jafar, or Maleficent cards into the battle. Each of these will either make attacking Vexen easier or aid Sora in terms of HP and survival.

Should Vexen activate an Attack Card, he will perform a single slash with his Frozen Pride. This can be dodged with simple run or Dodge Roll. If Vexen plays a magic card, he'll shoot a Blizzara spell at Sora. This attack is easily dodged, especially with Dodge Roll. Vexen will also only have access to one Sleight, Freeze. When this sleight is executed, Vexen will attempt to freeze Sora in a block of ice, slowly dealing damage to Sora as he's trapped. A well-timed run or Dodge Roll can be used to avoid the ice block, but should Sora get captured, the player will have to wait for the ice to break. Vexen repeats these tactics throughout the battle, so the same strategies can be used each time.

Second battle
During the second battle with Vexen his HP remains the same and he now has new sleights to use against Sora. The Blizzara and slash attack will return, as well as the Freeze sleight. The same strategies can be used to avoid them. The same enemy cards used to help Sora win the first battle with Vexen will likely be useful in this battle as well.

The first of Vexen's new sleights is Ice Burn. This sleight causes Vexen to create pools of slippery ice on random areas of the battlefield. When Sora steps on them, his speed will be reduced and he will merely trip. Careful maneuvering can be used to avoid the ice pools. Vexen also may use Ice Needles, a sleight that causes icicles to rise from the ground as they follow Sora. These icicles will not stop until they hit or until the Sleight runs its course, so it is best to keep at a constant run to avoid the icicles. His new trick, is the reviving ability granted by his Vexen enemy card. While this will increase the length of the battle, this unique enemy card shall be the prize for Vexen's defeat. This can be avoided by using the Parasite Cage enemy card.

Reverse/Rebirth
The battle against Vexen in Reverse/Rebirth mode will be nearly identical to his second battle with Sora in every aspect. The only differences will be Riku's greater power and speed overall, the presence of HP-restoring King Mickey friend cards, and the deadly sleights allowed because of Dark Mode. Vexen has access to a new sleight, Diamond Dust. During this sleight's execution, Vexen will create an ice storm that covers the entire battlefield. Simply Card Break him to avoid the attack. While Riku's movements and abilities are slightly different than Sora's, the strategies for obtaining victory are the same. Simply wait for Riku to enter Dark Mode and use its powerful attacks and sleights whenever possible. King Mickey cards will restore a great deal of HP, so this should be of no concern during the battle.

First battle
In comparison to the other bosses Sora has faced thus far, Vexen will be the most difficult to overcome. He has a great amount of HP, and the fact that he blocks all frontal attacks can make landing a perfect combo a difficult task. He also absorbs all Blizzard-attributed attacks, so it is important that the player not bring any Blizzard cards into the battle. As he has a one fourth chance of casting Blizzard, the player may wish to save all Donald friend cards for a Wild Crush sleight. Vexen has a high vulnerability to Fire-attributed attacks, so be sure to equip Sora with a deck that will allow the usage of Fire-based abilities such as Firaga, Firaga Burst, and Mega Flare. Bring a couple high-valued item cards into the battle to restore all used cards to Sora's deck, as well as a few Cure cards for the possible Curaga sleight. The player may wish to consider bringing the Red Nocturne (if approaching Vexen with a Fire-based deck), Jafar, Oogie Boogie, Maleficent, or Captain Hook enemy cards into the battle, as well.

The player should follow a hit-and-run strategy. Vexen may attempt a slashing combo that ends when he causes an icicle to rise from the ground below Sora, which can easily be dodged with Dodge Roll. One also can Card Break the attack, causing Vexen to lower his Shield, this not only opens him up to more damage but also is one few instances where he can be hit from the front. Attack Vexen when he is either reloading his deck, in a non-offensive setting, or after he is Card Broken. Otherwise, it is best to keep Sora on the move. Vexen may attempt to shoot a homing shard of ice at Sora when he activates a magic card, but with careful timing, Dodge Roll can be used to avoid this attack. Vexen will only have access to two sleights during the battle, both of which can be easily avoided. The first of Vexen's sleights being Freeze, he will attempt to encase Sora in a block of ice so he can rush forward for a slash attack. Dodge Roll or a Card Break is the best way to prevent this attack. Vexen's Ice Needles sleight, however, is a bit trickier to avoid. One can Card Break the sleight, but if Sora is out of zero cards or doesn't have a sleight with a higher value, he can either Dodge Roll or keep at a simple run as the icicles chase him. The sleight will either end once it's run its course or after it hits Sora.

The battle against Vexen should not be that much of a challenge. Be sure to heal if necessary, use any item cards in Sora's deck to restore used cards, and utilize the special abilities granted by any enemy cards to the fullest.

Second battle
The second battle against Vexen is just as difficult as the first battle. He will use the same attacks and sleights, so the same strategies can be used again to avoid them. Sora also should use the same deck he used during the first battle for the best chance of success, granted more cards can be added if Sora has increased his CP. The only differences in this battle will be Vexen's two new enemy cards, the Air Pirate and Vexen, and a dangerous new sleight. This new sleight, Slide Break, has Vexen elongate his Shield and increase his attack range. He will then attempt to strike Sora twice before slamming the Shield down on the ground, creating an icy shockwave. Either Card Break the attack or chain several Dodge Rolls together to avoid it. While the Air Pirate enemy card will prevent Sora from Card Breaking Vexen's item cards, the Vexen enemy card has a particularly annoying ability. When it is used, Vexen will revive himself with a great deal of HP restored a single time after his first defeat.

Reverse/Rebirth
The battle against Vexen in Reverse/Rebirth will be nearly identical to the his second battle with Sora in every aspect. The only differences will be Riku's greater power and speed overall, the presence of HP-restoring King Mickey friend cards, and the deadly sleights allowed because of Dark Mode. Vexen has access to a new sleight, Diamond Dust. During this sleight's execution, Vexen will create an ice storm that covers the entire battlefield. Simply Card Break him to avoid the attack. While Riku's movements and abilities are slightly different than Sora's, the strategies for obtaining victory are the same. Simply wait for Riku to enter Dark Mode and use its powerful attacks and Sleights whenever possible. King Mickey cards will restore a great deal of HP, so this should be of no concern during the battle. The player also may wish to stock King Mickey cards with two Soul Eater cards to perform either the Holy or Inverse Burst (depending on if Riku is in Dark Mode or not) sleight. This sleight allows Riku and Mickey to fire several spheres of light or darkness energy at Vexen, with a long range and able to hit multiple times if not Card Broken. Riku also will be able to perform Card Duels, successfully allowing him to perform the powerful Maelstrom or Dark Maelstrom sleights.

Absent Silhouette
In Kingdom Hearts II Final Mix, Vexen appears as an Absent Silhouette. Due to the absence of cards Vexen's attack style completely changes.

At the start of the battle, Vexen will surround Sora in a stream of data. In a flash of light, the player will find Sora trapped within a massive block of ice. Rapidly press to set him free. Vexen will then most likely attempt to hit Sora with twin, large snowflakes as they quickly spin around him. Dodge Roll multiple times or use Reflega to avoid the attack. The player can then attack the HP bar of Vexen's Frozen Pride Shield. Depleting the weapon's HP will not only lower Vexen's defenses, but it will also allow Sora to attack Vexen himself. The player should use caution, however, for if the purple Data Bar at the top left of the screen should fill as Sora stands in the homing data stream Vexen summoned at the start of the battle, an Clone Sora will attack. This is merely a distraction method, but the Clone Sora's attacks are powerful, its power and HP will only increase as the Data Bar fills from zero to five over the course of the battle. Thus, the player should target the Clone Sora the first. Otherwise, most combos the player attempts to use against Vexen will most likely be interrupted. Defeating a Clone Sora will relinquish MP orbs to restore any MP Sora has used up. One can then continue to strike Vexen with physical combos or Fire spells. Should Sora attempt an aerial combo, however, he must be prepared for Vexen to counter by shooting an icicle up from below Sora to halt the onslaught. Vexen will only use attacks the player has previously seen for the rest of the battle, so one should utilize the same strategies to avoid them as before.

The battle against Vexen is not exceedingly difficult. Defeating any Clone Soras Vexen creates should also become the first priority as soon as they spawn. Sora should immediately switch to Wisdom Form to attack Vexen with Fire spells, since this will boost the spell's power. An Ether should be used right before Sora's MP hits zero rather than afterwards. This will increase the amount of Fire spells that can be launched before Sora reverts to normal.

Data Rematch
The battle against Vexen's Data Rematch will flow similarly to the battle against his Absent Silhouette. The only differences will be the amount of HP he has, the pattern in which he uses his attacks, and a deadly new ability. This ability allows Vexen to summon large chunks of ice that will rotate around him and even rush at Sora before creating a massive icicle. Comet can be used to avoid damage throughout this attack, although Sora will need to use an Ether and perform Comet again to last through the whole technique. Also, the Clone Sora's HP is relative to the amount of data that Vexen collects. Sora will receive a Lost Illusion as a reward for defeating the Replica Data.