The moment that the [Evolved Telekinesis Clone] sliced through the warrior, the clone also collapsed and disappeared.
That clone had been created from the Evil Goddess's power, which Seiji forcefully transformed into his own clone. Basically, he had haphazardly used stolen power to create that clone, which was obviously rather reckless. Just the very fact that it succeeded without self-destructing instantly was great already.
It was thanks to this clone that Seiji had been able to break through the warrior's defenses. However, the fight wasn't over yet.
The warrior's body collapsed and vanished, but demonic mist instantly gathered and formed a human form with a new body!
"Demon Suppression Bell!"
Seiji cast his golden bell spell in time to suppress the black flame sword, which was floating in midair. This managed to obstruct the demonic mist's actions.
This sword was the true body.