Wheel Master

The Wheel Master is a large Unversed first fought as a boss in the Enchanted Dominion, later appearing at the Mirage Arena, where players can face it again with their friends in a co-op setting or by themselves. The Wheel Master's first and only appearance was in Kingdom Hearts Birth by Sleep, where it served as one of the first few bosses in Terra's storyline.

Story
Maleficent having controlled the darkness within Terra's heart to cause the Keyblade wielder to steal a sleeping Princess Aurora's heart, Maleficent attempts to recruit Terra to her side by offering him information about Master Xehanort. Terra refuses, his and Maleficent's discussion interrupted by a tremor that erupts throughout the castle. Maleficent declaring the Unversed wish to disturb them before she finally vanishes, Terra runs down to the throne room to be faced with the Wheel Master.

Design
The Wheel Master is a large Unversed resembling a spinning wheel. Its main body is comprised of a long, red column with its black head placed near the top. The tip of the column has three silver spikes on it, and its left side is lined by a few spikes as well. A long, bent, red arm with black joint connects a large, black wheel to the top of the column. This wheel has five red spokes in it and five white spikes on its outer edge. A similar, but shorter arm is attached to the main column just below the Wheel Master’s head, and ends in a large, black, claw-like spool with gold wire wrapped around it. A wide, flat, brown protrusion attaches to the main column just above the base and connects to two of the Unversed's legs. Its third leg is connected to the base of the column on the opposite side as the other two. Its red eyes are set in a sorrowful expression and the Unversed insignia is displayed on the base of the column.

Strategy
As the one of the first bosses fought the game, the Wheel Master will test the player's knowledge of the controls of the game, as well as Terra's fighting style, strengths, and weaknesses. Terra will have access to D-Links, Command Styles, and Shotlocks, so the player should use these special abilities to their advantage. It is also important that the player use a constant hit-and-run strategy.

At the start of the battle, the Wheel Master will fire a beam of energy from its spindle-like arm at Terra. If it hits, the player will need to rapidly tap to escape. Otherwise, this attack can be safely defended against with a well-timed Guard. One can also target the spindle-like arm with Lock-On and deplete its HP to prevent the beam attack from being used again at any point in the battle. This is not necessary to defeat the Wheel Master, however. If the Unversed boss leaps high into the air, either Slide out of the way or jump. Failure to dodge this attack will cause Terra to take damage from the short-ranged shockwave that results from the Unversed's landing. A well-timed jump may even allow the player to land a few attacks of their own on the Wheel Master before reverting to the hit-and-run strategy.

Another attack in the Wheel Master's arsenal will cause it to throw its spinning wheel-like attachment at Terra, something signified by the Unversed boss suddenly starting to spin its upper body in circles while a whilrwind surrounds it. Slide can be used to evade the incoming projectile. After the execution of this attack, the boss will leave itself open to damage for a period, eventually reverting to its technique of jumping at Terra and spawning a shockwave with each landing. Eventually, these jumps will lead the Wheel Master to the location of its dropped appendege, which it will then pick up and reattach to itself. It may also repeat the beam attack. The same strategies can be used to avoid it.

After taking enough damage, the Wheel Master will slump over, stunned, dropping much-needed HP orbs for Terra to pick up. Now is the time to bombard the Wheel Master with everything in Terra's arsenal from magic to physical combos. When the Wheel Master comes back to its senses, it will spin from side to side, dealing damage with each hit. Slide is Terra's best way of avoiding damage. For a majority of the battle afterwards, the Unversed boss will simply repeat previously seen attacks, such as the jumping shockwave attack and spinning wheel throw. Again, utilize the same strategies as earlier on to avoid these attacks. The Wheel Master will only have access to one other attack, one that is only available near the end of the battle as its last HP bar becomes visible. During this tactic's execution, the Wheel Master will shine with energy, charging at Terra. Slide is recommended for use in order to stay ahead of the boss. So long as the player heals when necessary and utilizes all special abilities when available, the Wheel Master will fall in due time.

Rematch at the Mirage Arena
The Wheel Master returns at the Mirage Arena, fought in the Spinner Runs round, one named specifically for it. Serving as the final boss after several waves of Unversed have been defeated, the Wheel Master will utilize the same attacks as in its first battle with Terra; the same strategies can be utilized to defeat it this time. The only differences in this battle will be the Unversed boss's greatly increased HP amount, the possible presence of any friends if the player selects co-op mode, and the increased power of the player's attacks. Should the player choose to face the Wheel Master as Aqua or Ventus, they merely must change strategies to one that suits a particular character's strengths and weaknesses (recall that Terra favors brute strength, Aqua her magic, and Ventus speed). Due to the player's greatly increased power and any help the player may get from friends, the Wheel Master will be quite easy to defeat, clearing the Spinner Runs round once and for all.

Trivia

 * The Wheel Master was the only boss available for battle in Terra's demo at the DKΣ3713 event in Japan; at this event, the Wheel Master was also the first Unversed boss to be shown to the public.