The next day, Kei, Teri, and Saitama gathered at a quiet area on the outskirts of the city. Using her attunement to magical energies, Kei cast a spell to trace the location of the rift. Tendrils of light spiraled from her hands, reaching into the sky and bending toward the unseen tear in reality.

"There," she murmured, feeling the rift's chaotic pull. "It's close."

They followed the magical trail to an abandoned industrial area, the air thickening as they neared the rift. The closer they got, the more they could feel its energy—a twisted, volatile force unlike anything Kei had ever encountered.

Suddenly, the ground shook, and from the shadows emerged a creature unlike any they'd seen. It was monstrous, towering over them with gleaming red eyes, its form shifting as if it couldn't fully contain its own power.

Kei's heart raced as she prepared for battle, but Saitama simply cracked his knuckles, stepping forward casually.

"Guess this is where I come in," he said, a hint of a grin on his face.

Without warning, the creature lunged, but Saitama met it head-on, his fist slamming into it with unimaginable force. The impact was so powerful that it shook the entire area, and in an instant, the creature was obliterated.

Teri's eyes widened in awe, and Kei could only stare, her mind struggling to comprehend the sheer power Saitama wielded.

"See?" Saitama said, dusting off his hands. "One punch."

As they turned to face the rift, Kei knew they'd found an ally more powerful than she'd ever imagined. With Saitama by their side, they might just have a chance to save both worlds.