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 Replica.

First Battle
At the beginning of the battle, the player should immediately begin to attack Vexen, but one must also take note of the fact that the boss will Guard against all frontal attacks. Thus, he 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 to nearly impossible to Card Break. Any Friend Cards should be saved for usage in Sleights or singular usage if they are of high value, should this occur. In terms of what Enemy Cards to bring into the battle, the player might wish to consider the Oogie Boogie, Captain Hook, Jafar, or Maleficent Cards. 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 a simple run or even 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, the boss will attempt to freeze Sora in a block of ice, damage slowly being dealt 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 will repeat these tactics throughout the battle, so the same strategies can be used each time. Attack Vexen from behind enough times or bombard him with magic Sleights, and he'll fall rather quickly.

Second Battle
During the second battle with Vexen, the gloves are off. While his HP remains the same, the boss now has new Sleights to use against Sora. The Blizarra 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 most likely will be useful in this battle, as well.

The first of Vexen's new Sleights is Ice Burn. This Sleight, when utilized, causes the boss 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 iciciles 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 the player keep at a constant run to avoid the icicles. Aside from these two new Sleights, the second battle with Vexen will be fairly straight forward. His most annoying trick, however, 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.

Reverse/Rebirth
The battle against Vexen in Reverse/Rebirth mode will be nearly identical to the boss's 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 lastly 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 to the player. If one is patient and careful, Vexen will fall.

Kingdom Hearts II Final Mix
In Kingdom Hearts II Final Mix, the absence of cards completely changes Vexen's attack style. Fought as an Absent Silhouette, Sora must conquer the phantom version of this Nobody with Donald and Goofy at his side.

At the start of the battle, Vexen's Absent Silhouette 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's Absent Silhouette 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 the boss's Frozen Pride Shield. Depleting the weapon's HP will not only lower the boss's defenses, but it will also allow Sora to attack Vexen's Absent Silhouette 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's Absent Silhouette summoned at the start of the battle, an Anti-Sora with its own HP bars to deplete will attack. This is merely a distraction method, but the Anti-Sora's attacks are powerful, and this power and its HP will only increase as the Data Bar fills from zero to five over the course of the battle. Thus, the player should make the Anti-Sora the first target. Otherwise, most combos the player attempts to use against Vexen will most likely be interrupted. Defeating an Anti-Sora will relinquish MP orbs to restore any MP Sora has used up. One can then continue to hammer Vexen's Absent Silhouette with physical combos or even Fire spells. Should one attempt an aerial combo, however, the player must prepare for Vexen's Absent Silhouette 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.

All in all, the battle against Vexen's Absent Silhouette is not exceedingly difficult. One simply must, as with all boss battles, have patience. The player also should know when to dodge and to heal. Defeating any Anti-Soras the boss creates should also become the first priority as soon as they spawn. The fact that the player must break through a constantly refilled HP bar just to get to the boss may be tedious, but a surprising amount of HP can be depleted before the Frozen Pride returns to Vexen's Absent Silhouette if one combines the usage of Fire spells with Sora's most powerful physical combos. The player should immediately go into Wisdom Form if they wish to attack Vexen with Fire or its upgrades, 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. Keep this up, and Vexen's Absent Silhouette will fall in due time.

Data Rematch
The battle against Vexen's Data Replica will flow quite similarly to the battle against his Absent Silhouette. The only differences will be the amount of HP the boss has, the pattern in which he uses his attacks, and a deadly new ability that allows Vexen's Data Replica to summon large chunks of ice that will rotate around him and even rush at Sora before the boss creates an icy shockwave. Comet is a good way to avoid this attack, so long as one continues to hit the boss throughout its execution and uses an Ether right after Comet ends, thus allowing it another immediate use to counter the boss's lengthy ability. In short and aside from these minor differences, the battle against this Data Replica should not be difficult. All the player must do is recall the strategy used in the Absent Silhouette. Sora also should be of a relatively high level, using spells such as Curaga and Reflega, as well as Drive Forms and a powerful Keyblade such as the Bond of Flame (this will make Fire spells even more effective, along with any power boosts granted to them by Wisdom Form). Defeat Vexen's Data Replica, and a Lost Illusion will be obtained.