The Demon King used the [Demon King's Roar] spell making the young man flinch in fear. He used a cleansing spell on himself to remove the fear and got ready for the attack.
The Demon King shot forward at an incredible speed. With his wings, he glided through the air as he arrived in front of the young man. He swung his sharp claw at the young man, nearly ripping his skin out.
The young man jumped back in fear and took out a small thorn from his interdimensional storage. It was actually a quill that came from a demonic echidna he had killed not long ago.
The B-ranked monster wasn't the most strong, but the poison in its quills was some of the most toxic things the young man had ever seen.
So, he planned on using it on the Demon King today.
As the demon king was flying towards him again, the young man threw the quill at him. The quill struck his chest and surprisingly pierced him, immediately poisoning him with the demonic echidna's poison.