Billy didn't try to hold back on the use of mana. He only had a small percentage left, so he went and used the full potential of Light Speed Sword. In the end, he regretted it since he ended up hitting the monster's head, and his glaive pierced the monster's chin. However, the impact pushed the monster and Billy to the ceiling above them. Not only did Billy feel like he had hit a concrete wall at five hundred kilometers per hour, but his moving speed made even the small particles of dust pierce his body and eat away his flesh. The friction made his skin begin to burn, and his sweat alone made him feel like someone was pouring boiling oil on him.
"Fucking hell…" Billy thought.
The plan was to destroy the monster's brain on the first attack, but that caused more harm than anything. Fortunately, the dragon also got hurt like never before. Even with his mass and current power, Billy would become a lot more deadly, moving at one hundred and fifty thousand kilometers per second. It was almost a miracle that his body withstood that…
Unfortunately, Billy wasn't the first to recover from that attack, the dragon was, and the beast tried to smash him against its own chin. Billy knew that he was in trouble since he couldn't move, so he used Regen several times to simulate the over-health effect. In the end, Billy saw his eyes darkening due to the pain of being almost smashed to death, it would have been worse if the monster had used its claws to pierce him, but since the beast couldn't see him, that was a risky move.
Nevertheless, thanks to Regen, Billy finally recovered enough to move, and he made his glaive spin to make the dragon feel hellish pain. He also used lightning to increase the piercing power. Thanks to that, the beast's grip weakened quite a bit, and he kicked both paws with all his might before he used Light Spear Sword again and moved to the top of the monster's head. This time, he just increased his speed by thirty times, and he avoided wounding himself. However, when he got on the forehead of the monster, he used all his remaining mana to increase his upper body speed. Before long, the sword and glaive dug a hole in the monster's forehead and completely destroyed the brain. The body of the monster finally stopped moving and then began to fall…
You obtained 275.000.000 experience points.
The skill Destructive Aura obtained 100.000 experience points.
The skill Heroic Spearmanship obtained 100.000 experience points.
The skill Fierce Blast obtained 100.000 experience points.
The skill Mana Shield obtained 100.000 experience points.
…
Billy sighed in relief as he began to fall as well. He quickly hid his sword, and then he began to ache all over now that the tension had left him… he knew that it would come, but he still was caught with his pants down. Still, that couldn't have been helped, the monster was that troublesome and he had to go all out and that was rare... perhaps using the dragon now and then to get stronger and more experience wouldn't be a bad idea.
After a couple of seconds, Billy and the guardian fell to the ground and once again, Billy felt some hellish pain. His muscles couldn't endure any more effort, so he laid down using Telekinesis instead of moving his own body. He needed a serious break… The dungeon will change its layout soon, but he couldn't be bothered to leave now and save time. They also had to get the materials from the dragon's body… There was no time to idle away, Billy had to keep working to make the most out of the whole mess. Also to make sure that he won't have to come too often.
"Sorry, Christina, Hector, and Helen… Papa will stay here for a while longer…" Billy thought and then sighed.
"It seems you're alright, more or less…" Lucyna said when the others and she finally approached.
"We heard some noises, but… Did you make that hole on the dragon's head?" Icarus asked.
Billy was too tired to answer, so he just sighed… Before the others could do anything else, something left the monster's body. It was the core of the dungeon shining, and once it appeared, it quickly moved toward the ceiling of the last room and crossed it like it wasn't made of matter. Billy never saw a core moving, so that made him frown.
"That sure was weird… But we achieved our goal," Meryl said. "Congratulations, everyone."
"I don't feel like I did much, but a victory is a victory," Icarus said and then smiled.
"I suppose we need to learn the lesson here, our strength is far from perfect," Lucyna said and then smiled as well. "Still, we should celebrate."
"Yay…" Billy said, totally unmotivated.
The dungeon began to tremble, and its layout began to change as well. However, Billy ignored that since his monsters there still were killing monsters and granting mana. So, he began to work on dismantling the dragon's body with his Glaive and Telekinesis while he was floating around. He wasn't the type to be lazy around, but he wished that he had some sort of pillow to use and rest while his glaive was doing the hard work. The others frowned when they saw Billy so nonchalant, but that was how he was usually, so they recovered and began to help.
The monster's body had been damaged more than a little bit, but its scales, claws, and even bones could still be used. If anything, the bones were a lot easier to use the scales, but since Meryl could use them better than anyone else, they would go to hell. The only issue was how they would share the dragon heart. It should be more powerful and perhaps taste than others. It would be hard to split that among four people.
