"Bang"
The muzzle at the end of the sniper rifle emitted smoke after the shot. The bullet came out of the barrel and flew at high speed directly to its target.
Before the bullet hit the D3's eye, its irises regained focus and stared at the projectile in front of its eyes.
It was already too late to dodge, so it tried closing its eyelids, but failed. The bullet entered through its eyes and pierced until the back of its head.
Instead of piercing out of the head, the bullet hit the skull and failed to come out. It bounced around the brain creating a mushed white and red brain matter.
From the empty eye socket, the mushed brain flowed out like sticky liquid as the D3's body fell down into the ground.
Jun hurriedly took a Bone Dagger from his dimensional storage and stabbed the other eye. He didn't pull the dagger to make sure that the D3 wouldn't regenerate.