C23 To be Trapped in the Sea of Evil Spirits

Bedivere suddenly felt a chill behind his back. When he came back to his senses, he realized that the scenery around him was rapidly changing: the battlefield landscape that was filled with bullets had been eroded by another landscape. In a few seconds, the surroundings had turned into a cold and gloomy cave.

"Is this an illusion technique?" He touched the cave wall