Silhouette?

Gustav's fist still slammed into the inmate's chest, but he also received the full brunt of the energy attack.

Bang! Bang!

Both of them were blasted backward, and cracking sounds rang out.

Gustav landed on his feet about seventy feet away from his initial position. He slid backward for a few seconds while the other inmate slammed onto the ground with his back and a broken sternum. He spat out blood and repeatedly coughed before passing out.

Gustav was back at his former position after taking that attack.

"You're bleeding!" The girl who Gustav saved earlier shouted out after noticing the palm-sized hole in Gustav's left shoulder area.

"I'm fine," Gustav voiced out as blood rolled down his arm.

'These ones are truly experienced, unlike the opponents I have been facing in the past,' Gustav said internally as he stared at his shoulder injury.

Even though that inmate was weaker, he still managed to injure Gustav.