Replying...
Intro. Psykos, seeing that he could not beat Tatsumaki, decided to merge with the king of the monsters Orochi, now becoming Psykos-Orochi, Psykos in his fusion manages to measure up to about 100 meters high, while Orochi about 27 meters, but since they have taken the entire base of the monster association headquarters, the two are several kilometers high. Psykos-Orochi a high-level monstrous fusion in One-Punch Man, created when the esper Psykos joins the Orochi remnant core, powered by "God". They combine telekinesis, destructive energy rays, and regeneration, becoming a superior Dragon-level threat that forces Tatsumaki to fight his hardest in City Z.

Psykos-Orochi

@Mathias