Flower-Heaven Bone of Madness
This Zanpakutō is unique in that it transforms into two completely separate swords, existing as a daisho sword pair, consisting of a tachi and a wakizashi. Their cross guards are rectangles, with the corners cut off, decorated by a pattern of cherry petals and lines, and each sports a dark-blue handle. Like other Zanpakutō, Katen Kyōkotsu has a personality of her own. However, unlike other Zanpakutō, this personality shines through in battle and prevents wielder from fighting with their full powers until Katen Kyōkotsu is in the mood for it making it an incredibly difficult weapon to wield.
- Shikai: Its Shikai command is "Flower Wind Rage and Flower God Roar, Heavenly Wind Rage and Heavenly Demon Sneer" (花風紊れて花神啼き天風紊れて天魔嗤う, hana kaze midarete, kashin naki, tenpū midarete, tenma warau). Kyōraku sets the two blades against each other in a cross, and then pulls after uttering the poem-like command. When the flash clears, Katen Kyōkotsu has become a pair of huge, heavily-curved, black Chinese scimitars with silver edges. The hilt and tsuba of each are still the same as they were in Katen Kyōkotsu's base-form, but they now sport long red tassels dangling from the end. Despite the two swords becoming identical in this state, they still serve as one (the wakizashi) being used mainly for speed strikes, and the other (the tachi) being used mainly for power strikes. Hence that they still exist as a daisho sword pair, with the wakizashi being slightly smaller in size than the tachi.
Shikai Special Ability: The power of Katen Kyōkotsu is to "make children's games real". The Zanpakutō makes the rules and anyone who steps within the boundaries of its spiritual pressure is forced to play by those rules, including wielder themself. "if you win you live, if you lose you die".
· Bushōgoma (不精独楽, Lazy Spinning Top): wielder rotates with both blades facing in opposite directions creating large wind blades that fire toward an opponent from Katen Kyōkotsu. The wind blades join together forming a spinning circle of wind that upon contact with a target envelops the target with tornado-like intensity. The attack is not only dangerous but can disorient an opponent trapped within it. The technique is powerful enough to counteract high-powered ki blasts. The game this technique represents is a spinning top game.
· Kageoni (影鬼, Shadow Demon): The rule of this game is that whoever gets their shadow stepped on "loses." The game itself allows competitors to manipulate shadows to their advantage. For example, wielder can hide himself in shadows by using this technique, and he can also control the shadows and use them to attack an opponent by attacking the shadow they are currently standing upon.
· Irooni (艶鬼, Colorful Demon): This is a color-based game where you say the name of the color you want to cut with your sword and you cannot cut anything else. If the color that you call does not exist on your body, the damage is minimal, even if the attack would normally inflict a much more severe wound. The opposite is true; by calling out a color you're wearing and attacking, the damage given is proportional to the amount of that color on you. To maximize damage, you have to use a color that maximizes the risks to your person as well as your enemy's. For example, by wearing black robes and calling "black," one would inflict massive damage on an enemy if struck even if the actual blow itself was minimal or minor, but the caller would also suffer serious damage if he/she is struck by the enemy in return.