Atomic Samurai's Disciples vs. Evil Natural Water

Atomic Samurai's Disciples vs. Evil Natural Water is the fight between the A-Class heroes Iaian, Okamaitachi, Bushidrill, and the executive of the Monster Association, Evil Natural Water.

Prelude
Atomic Samurai's Disciples chase down a monster that managed to escape their initial attacks, but he escapes to a room which contains Evil Natural Water and Mad Doctor Fish in a glass tank. He breaks the tank, releasing the Mysterious Beings to defeat the heroes, but gets slain himself.

Trivia
There is an art inconsistency. After Iaian's sword gets pierced, it appears to fixed in the very next page.