One punch.

A character with a black mask and yellow eyes screams in pain as a bright, fiery energy erupts from their body, followed by a burst of smoke and energy rings. The scene shifts to show the character's face in close-up, revealing their agonized expression, while another character with dark hair looks on with a serious expression. The sequence ends with the character's body being consumed by the glowing energy, suggesting a powerful transformation or attack. The setting appears to be a dark, possibly outdoor environment with a smoky atmosphere.