Kongousai

Kongousai (Adamantine Smash) is a Special Move used by Shigen Naoe, first appearing in The Last Blade.

Description
Shigen powerbombs his opponent, then creates a gem stalagmite that spikes his opponent's back before breaking itself. This attack can transition into the following:
 * Kai (Break) - Shigen powerbombs his opponent a second time, then stomps on them. Can transition into:
 * Kay (Crush) - Shigen powerbombs his opponent a third time, now into a cluster of gem stalagmites.
 * Retsu (Violence) - Shigen palm strikes his opponent away.
 * Shintendouchi (Earth-Shaking) - One of Shigen's Super Secret Slashes. Shigen powerbombs his opponent into a cluster of gem stalagmites.
 * Aku (Grip) - Shigen lifts his opponent, crushes them in his hands, then powerbombs his opponent a second time and stomps on them. Can transition into:
 * Syou (Rise) - Shigen palm strikes his opponent upward.
 * Tsui (Fall) - Shigen picks his opponent back up, then claws them away.
 * Dohatutensyou (Towering Rage) - One of Shigen's Hidden Secret Slashes. Shigen roars, which slashes his opponent 7 times with the power of Byakko.

Strategy
To be added soon...

Trivia

 * Shintendouchi & Dohatutensyou are both Yojijukugo - Japanese four-character idioms.
 * Shintendouchi (震天動地) - Earth-Shaking
 * Dohatutensyou (怒髪衝天) - Boiling with rage.