Rimuru Tempest and Shiki found themselves trapped in the Imagination world, unable to escape until one of them emerged as the victor. Rimuru was known as a True Dragon, with immortality that made it impossible to kill him. He had unique abilities, including temperature cancel, physical and magic nullification, and holy and demonic resistance. He could also nullify mental and spiritual attacks. Rimuru's most significant skill was Void God Azathoth, which enabled him to absorb everything and make it his power. He also had a multiverse barrier that could withstand over ten quintillions of multiverses collapsing. On the other hand, Void Shiki had control over every aspect of the concept of death and existence. Her intelligence surpassed omniscience, and she could travel faster than the speed of light. She could manipulate concepts, making it impossible for her opponents to protect themselves from her attacks. Shiki's most potent weapon was the Death God's Eye, which enabled her to visualize the redline and destroy an opponent's soul, existence, and body beyond repair. It didn't matter how powerful her opponent was; once she touched their red line, they ceased to exist. She could also nullify an opponent's durability and shields. As the battle began, Rimuru tried to absorb Shiki's powerful abilities, but the Death God's Eye made it impossible for him to survive. In return, Rimuru launched multiple attacks at Shiki with his Void God Azathoth ability, but Shiki's concept manipulation weakened his attacks significantly. As the fight dragged on, it became apparent that neither opponent would emerge victorious. Suddenly, Rimuru's multiverse barrier began to wear off, and the Imagination world began to collapse. Shiki realized that this was an opportunity to defeat Rimuru and launched an all-out attack on him. Despite Rimuru's best efforts to protect himself, he was unable to withstand Shiki's power and finally succumbed to her Death God's Eye. With Rimuru dead, Shiki was declared the winner of the battle. Although Rimuru's abilities were impressive, Shiki's concept manipulation proved to be too much for him to handle. She emerged victorious and was finally able to leave the Imagination world and return to the real world, while Rimuru's body was left behind.