Kidou is one of the advantages Shinigami have over Hollow. Shinigami can convert their Reiatsu into attacks or to bind the enemy. Kidou can be used to change the course of the battle, it can decide who wins and loses. To learn further Kidous, you must ask someone of a higher level which knows more Kidou than you to allow you to learn them. They will then take you and fight you until you learn it. That doesn't mean that every time you train with someone you will learn that Kidou. You can still fail it. Below are the lists of known Kidous that people can learn;
[[Taken from Bleach Wiki]]
Bakudō (縛道, "Way of Binding")
1.Sai (塞, Block): Locks a target's arms in place behind their back.
4. Hainawa (這縄, Crawling Rope): An energy rope entangles the target's arms.
8. Seki (斥, Repulsion): Creates a round shield that seems to temporarily paralyze and repel whatever strikes it.
9. Geki (撃, Strike): Engulfs the target in red light, completely paralyzing them.
9. Hōrin (崩輪, Disintegrating Circle): Causes an orange hued tendril with spiraling yellow patterns to erupt from the users hand and attempt to trap a target. The Kidō is able to connect with another one of itself if both have captured a target and bind them together.
21. Sekienton (赤煙遁, Red Smoke Flight): Creates a blast upon activation and is used like a ninja's smoke bomb.
26. Kyokkō (曲光, Bent Light) : Hides the target from sight, by bending light. The spell has the ability to totally hide the presence and reiatsu of the user or specified object.
30. Shitotsu Sansen (嘴突三閃, Beak-Thrust Tri-Flash): Forming a golden triangle with one's finger, it shoots three beams of light that pin the target to one place on a surface, slamming into his or her body in three places in a shape of an equilateral triangle.
37. Tsuriboshi (吊星, Hanging Star): Creates a star-shaped cushion of Spiritual Energy, which anchors it to nearby objects with "ropes" of spirit particles. It can stop falling objects, acting like a safety net.
39. Enkōsen (円閘扇, Round Lock Fan): Summons a shield of condensed reiatsu to block opponents' attacks.
58. Kakushitsuijaku (摑趾追雀, Trace-Catching Pursuit Sparrows): Tracks and locates any spiritual force the user focuses on.
61. Rikujōkōrō (六杖光牢, Six-Staff Light Prison): Summons six thin, wide beams of light that slam into a target's midsection, holding them in place. The target is then unable to move any part of their body including the parts that were not struck by the beams.
62. Hyapporankan (百歩欄干, Hundred-Step Rail Parch) : A rod formed of energy is thrown towards the target before it disintegrates into numerous short rods which are used to pin the target to the surroundings and render them immobile.
63. Sajō Sabaku (鎖条鎖縛, Chainlink Chain Bond(s)): Similar to Bakudō No. 4, but stronger, this spell binds the arms of a target.
73. Tozanshō (倒山晶, Inverse Mountain Crystal): Creates an inverted pyramid-shaped barrier around the caster.
75. Gochūtekkan (五柱鉄貫, Five-Post Iron Weights): Summons five incredibly tall and thick pillars which are connected to each other by chains to pin a target to the ground.
77. Tenteikūra (天挺空羅, Heavenly Void Net): Transmits messages mentally to anyone within an area of the caster's choosing.
79. Kuyō Shibari (九曜縛, Nine-Daylight Bonds) : Creates eight black holes that emit spiritual energy in the personal space surrounding the target, with a ninth black hole manifesting in the center of the targets chest.
81. Dankū (断空, Severing Void): Creates an energy barrier in the form of a rectangular wall. According to Byakuya, it is capable of stopping destructive spells up to #89.
99, Part 1. Kin (禁, Seal): Ties the target's arms on the back in addition to wrapping the spiritual fabric around the entire body, and continues to pin the target with spiritual fabric stacked to the ground around the target with several iron shafts in an "X" shape.
99, Part 2. Bankin (卍禁, Great Seal): This spell covers the target from head to toe with spiritual fabric (First Song), stabs them with numerous metal bolts (Second Song), and then smashes them with an immense metal cube (Final Song).
Hadō (破道, "Way of Destruction")
1. Shō (衝, Clash): Pushes the target away from the caster.
4. Byakurai (白雷, Pale Lightning): The user fires a concentrated, powerful lightning bolt from their finger.
11. Tsuzuri Raiden (綴雷電, Bound Lightning): Electric current flows through any object the user touches and is able to lead electricity, damaging any target that is in contact with the object the current runs through.
12. Fushibi (伏火, Lain Fire): Momo Hinamori uses this spell in conjunction with Shakkahō and a Kidō net that has entangled her opponents resulting in a large explosion around them all.
31. Shakkahō (赤火砲, Red Fire Cannon): Fires a ball of red energy at a target.
32. Ōkasen (黄火閃, Yellow Fire Flash): Fires a wide arc of yellow energy at a target.
33. Sōkatsui (蒼火墜, Blue Firefall): Fires a burst of blue spiritual energy at a target in a similar manner to #31, but over a wider area and with more power.
54. Haien (廃炎, Nullific Flames): Fires a blast of purple spiritual energy that will incinerate a target completely when it makes contact.
58. Tenran (闐嵐, Swelling Storm): A widening tornado-like blast is fired towards the target.
63. Raikōhō (雷吼炮, Thunder Roar Sear): Fires a massive wave of yellow energy at a target.
73.Sōren Sōkatsui (双漣蒼火墜, Twin-Wake Blue Firefall): Essentially a doubled version of #33, this spell fires two shots of blue fire with greater potency than the single-shot variety.
88. Hiryūgekizokushintenraihō (飛竜撃賊震天雷炮, Flying Dragon Marring Heaven-Shaking Thunder-Sear): Fires a gigantic electricity blast of spiritual energy resulting in a truly enormous explosion.
90. Kurohitsugi (黒棺, Black Coffin) : Envelops the target with a powerful torrent of gravity that takes the form of a box of black energy, covered in several spear-like protrusions. The spears then pierce the box, lacerating the one inside from head to toe. According to Aizen, it has the power to distort both space and time.
91. Senjū Kōten Taihō (千手皎天汰炮, Thousand-Hand Bright Heaven Culling-Sear): Summons several spears of light that are all fired towards the same focal point where the intended target resides. The culminating explosion is exceedingly devastating.
96. Ittō Kasō (一刀火葬, Lone Blade Cremation): A forbidden spell used by Genryusai Shigekuni Yamamoto. It is a spell that causes a huge pillar of fire to erupt from the ground in the shape of a katana's tip.
[[Taken from Bleach Wiki]]
Bakudō (縛道, "Way of Binding")
1.Sai (塞, Block): Locks a target's arms in place behind their back.
4. Hainawa (這縄, Crawling Rope): An energy rope entangles the target's arms.
8. Seki (斥, Repulsion): Creates a round shield that seems to temporarily paralyze and repel whatever strikes it.
9. Geki (撃, Strike): Engulfs the target in red light, completely paralyzing them.
9. Hōrin (崩輪, Disintegrating Circle): Causes an orange hued tendril with spiraling yellow patterns to erupt from the users hand and attempt to trap a target. The Kidō is able to connect with another one of itself if both have captured a target and bind them together.
21. Sekienton (赤煙遁, Red Smoke Flight): Creates a blast upon activation and is used like a ninja's smoke bomb.
26. Kyokkō (曲光, Bent Light) : Hides the target from sight, by bending light. The spell has the ability to totally hide the presence and reiatsu of the user or specified object.
30. Shitotsu Sansen (嘴突三閃, Beak-Thrust Tri-Flash): Forming a golden triangle with one's finger, it shoots three beams of light that pin the target to one place on a surface, slamming into his or her body in three places in a shape of an equilateral triangle.
37. Tsuriboshi (吊星, Hanging Star): Creates a star-shaped cushion of Spiritual Energy, which anchors it to nearby objects with "ropes" of spirit particles. It can stop falling objects, acting like a safety net.
39. Enkōsen (円閘扇, Round Lock Fan): Summons a shield of condensed reiatsu to block opponents' attacks.
58. Kakushitsuijaku (摑趾追雀, Trace-Catching Pursuit Sparrows): Tracks and locates any spiritual force the user focuses on.
61. Rikujōkōrō (六杖光牢, Six-Staff Light Prison): Summons six thin, wide beams of light that slam into a target's midsection, holding them in place. The target is then unable to move any part of their body including the parts that were not struck by the beams.
62. Hyapporankan (百歩欄干, Hundred-Step Rail Parch) : A rod formed of energy is thrown towards the target before it disintegrates into numerous short rods which are used to pin the target to the surroundings and render them immobile.
63. Sajō Sabaku (鎖条鎖縛, Chainlink Chain Bond(s)): Similar to Bakudō No. 4, but stronger, this spell binds the arms of a target.
73. Tozanshō (倒山晶, Inverse Mountain Crystal): Creates an inverted pyramid-shaped barrier around the caster.
75. Gochūtekkan (五柱鉄貫, Five-Post Iron Weights): Summons five incredibly tall and thick pillars which are connected to each other by chains to pin a target to the ground.
77. Tenteikūra (天挺空羅, Heavenly Void Net): Transmits messages mentally to anyone within an area of the caster's choosing.
79. Kuyō Shibari (九曜縛, Nine-Daylight Bonds) : Creates eight black holes that emit spiritual energy in the personal space surrounding the target, with a ninth black hole manifesting in the center of the targets chest.
81. Dankū (断空, Severing Void): Creates an energy barrier in the form of a rectangular wall. According to Byakuya, it is capable of stopping destructive spells up to #89.
99, Part 1. Kin (禁, Seal): Ties the target's arms on the back in addition to wrapping the spiritual fabric around the entire body, and continues to pin the target with spiritual fabric stacked to the ground around the target with several iron shafts in an "X" shape.
99, Part 2. Bankin (卍禁, Great Seal): This spell covers the target from head to toe with spiritual fabric (First Song), stabs them with numerous metal bolts (Second Song), and then smashes them with an immense metal cube (Final Song).
Hadō (破道, "Way of Destruction")
1. Shō (衝, Clash): Pushes the target away from the caster.
4. Byakurai (白雷, Pale Lightning): The user fires a concentrated, powerful lightning bolt from their finger.
11. Tsuzuri Raiden (綴雷電, Bound Lightning): Electric current flows through any object the user touches and is able to lead electricity, damaging any target that is in contact with the object the current runs through.
12. Fushibi (伏火, Lain Fire): Momo Hinamori uses this spell in conjunction with Shakkahō and a Kidō net that has entangled her opponents resulting in a large explosion around them all.
31. Shakkahō (赤火砲, Red Fire Cannon): Fires a ball of red energy at a target.
32. Ōkasen (黄火閃, Yellow Fire Flash): Fires a wide arc of yellow energy at a target.
33. Sōkatsui (蒼火墜, Blue Firefall): Fires a burst of blue spiritual energy at a target in a similar manner to #31, but over a wider area and with more power.
54. Haien (廃炎, Nullific Flames): Fires a blast of purple spiritual energy that will incinerate a target completely when it makes contact.
58. Tenran (闐嵐, Swelling Storm): A widening tornado-like blast is fired towards the target.
63. Raikōhō (雷吼炮, Thunder Roar Sear): Fires a massive wave of yellow energy at a target.
73.Sōren Sōkatsui (双漣蒼火墜, Twin-Wake Blue Firefall): Essentially a doubled version of #33, this spell fires two shots of blue fire with greater potency than the single-shot variety.
88. Hiryūgekizokushintenraihō (飛竜撃賊震天雷炮, Flying Dragon Marring Heaven-Shaking Thunder-Sear): Fires a gigantic electricity blast of spiritual energy resulting in a truly enormous explosion.
90. Kurohitsugi (黒棺, Black Coffin) : Envelops the target with a powerful torrent of gravity that takes the form of a box of black energy, covered in several spear-like protrusions. The spears then pierce the box, lacerating the one inside from head to toe. According to Aizen, it has the power to distort both space and time.
91. Senjū Kōten Taihō (千手皎天汰炮, Thousand-Hand Bright Heaven Culling-Sear): Summons several spears of light that are all fired towards the same focal point where the intended target resides. The culminating explosion is exceedingly devastating.
96. Ittō Kasō (一刀火葬, Lone Blade Cremation): A forbidden spell used by Genryusai Shigekuni Yamamoto. It is a spell that causes a huge pillar of fire to erupt from the ground in the shape of a katana's tip.
