You thought you had gotten him but Shunsui appears behind you with a huge grin unharmed with his Shikai, & completes Daruma-san ga Koronda by slashing down at you… cutting off your whole arm off guard. His laidback attitude shifted. “Your weapon’s mine now. Your life will be next.”

Narrator: (Shikai Special Ability: Katen Kyōkotsu has the ability to "turn children's games into reality". The Zanpakutō makes the rules depending on its own whims, & whoever steps within the range of its Reiatsu is forced to play by those rules, including Shunsui himself or die.

Bushōgoma
Takaoni: Allows Shunsui to teleport a great distance above his opponent & close the gap between them. Shunsui later explains that in this "game", whoever is higher up "wins."
Kageoni: The rule of this game is simple: whoever gets their shadow stepped on "loses". The game itself allows competitors to manipulate shadows to their advantage. For example, Shunsui has demonstrated the ability to hide himself in shadows when using this technique, and he can also control the shadows, using them to attack an opponent by attacking the shadow they are currently standing upon therefore transferring the game to said opponent. In addition, Shunsui can make multiple shadow clones of himself that can attack his opponent from multiple angles.
Irooni: In this color-based game, you must 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. However, the opposite is also 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 yourself as well as your enemy. 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 minor, but the caller could potentially be at risk of suffering major damage in return depending on how much of the enemy's skin or clothing is covered in black. So it's wise to call out the color you have on the most.
Daruma-san ga Koronda: This game is based around the idea that whenever one's back is turned or they aren't focusing on their opponents. After Shunsui or his opponent is marked as being "it", the other combatant travels toward them on a trail of Reiatsu left by their attack in order to catch them by surprise. However, if the combatant who is "it" sees their opponent while they are moving, that opponent loses and thus dies. Essentially, Said opponent has free rein to blitz along the nearest reiatsu path to their opponent and attack them from behind. It is similar to red-light green-light. It allows Shunsui to blitz opponents standing right in front of him if they drop their focus for the briefest moment due to Kageokuri's illusory duplication ability, & seemingly will always put him in position behind his opponent for a sneak attack.
Kageokuri: A game whereby staring hard enough at an opponents shadow, Shunsui or his opponent can project illusory afterimages in a different location completely indiscernible from his real self if the opponent were to take his eye off of him for a single moment. Shunsui is skilled enough in this game he can create several duplicates of himself the moment the enemy were to take their eyes off of him. By staring hard enough at their shadow, Shunsui or his opponent can project an afterimage in a different location.
Yubikiri: A game which punishes you for lying. If you lie to each other, your fingers get paralyzed on the first lie; your whole body feels like it is getting crushed by a fist on the second lie and finally, on the third lie, you feel unimaginable pain as if your viscera were being stabbed from the inside. It was a technique meant to extract information from the kind of opponent who lies during battle. The wielder can’t lie either.)