Ten thousand years ago, when the [King] first launched the rebellion, although it was indeed injured in the battle, it was far from this severe.
The reason it was left with only half a skull was entirely due to the aftereffects of a failed transformation experiment it conducted on itself.
That failure was a horrifying time explosion.
The so-called time explosion occurred when the [King] introduced chaotic time currents from subspace into its own body, attempting to fuse and gain the Power of Time.
In the end, it couldn't withstand it, and an explosion happened.
This explosion did not occur on the material level but happened on the time level.
In the explosion, chaotic time ravaged within the [King]'s body, causing most of its body to disappear forever.
This disappearance couldn't be replenished by normal means.
Even if it forged new body parts with precious materials and installed them, they would soon disappear again.
