Nothing major happened in the last few days, so Billy used that chance to grind as much as possible. That being said, Billy leveled up many times in the last few weeks, so the tyrants only granted him one thousand experience points per kill now. It was a bit bothersome, but it couldn't be helped since the fights were that easy for him and for his summons. Fortunately, the experience that he gets using his powers never changes and the mana that he gets with each skill only increases by the level, so it was fine for the time being.
"I guess the best way to counter this is to reach the lower levels of the dungeon where the monsters spawn stupidly fast," Billy thought.
Speaking of leveling up stupidly fast, the spiders were strong enough to let only three of them in a single spot to fight the tyrants. As usual, they never get hurt while fighting. In any case, Billy took the strongest spiders and divided them into groups and summoned weaker ones to help the leader of the group, which would increase the speed that he gets experience even more.
For a few days, Billy worked with that in mind. Still, eventually, he was forced to stop with that because one of his spies suddenly sent a message saying that a town in the Northern part of the continent had been attacked by a weird but super powerful figure.
"A weird figure… Could it be a demi human?" Billy furrowed his eyebrows.
Billy decided to contact Icarus, who was watching the enemy's territory, and he replied that he didn't see anyone leaving their base. He didn't see any signs of magic being used either… before Billy could talk with the others directly, another message arrived, alerting him that another town had been destroyed.
"Was it the same guy?" Billy thought. "I need to check this…"
Billy alerted his wives to stay on guard and told Icarus, Lucyna, and Meryl to be wary of attacks. While using his invisibility, Billy flew to the Northern area of the continent, and after half an hour, he found both towns. There were no signs of armies, so the report was accurate… Still, the attack was powerful enough to create craters and destroy whole blocks with a single attack.
"Was he teleported here? I can see weird signs of mana in the center of the town… It is almost like a crater, without the destruction," Billy thought.
Only the maker was supposed to have that kind of power, but why would he attack the humans' territory when Billy and the others were strengthening their base and preparing for the invasion?
Billy decided to fly higher in that state and see all towns and cities from above. He watched things for a while, and eventually, he saw the mana changing in a certain town. While invisible, Billy flew toward it, and then he saw a man that looked like a lizard attacking the people around with his tongues that resembled a whip and destroying buildings with punches. Billy first thought was of to kill that guy, but he just smashed his head against the ground a little. The impact had been powerful enough to make the whole town tremble, but that guy still managed to stay conscious.
"Hoh, not bad…" Billy thought, and then he smashed the enemy's head a bit harder, to the point that he heard a crack.
The enemy was still alive, but it barely survived now. In any case, the reptile man was pretty strong… A lot stronger than any normal person could be on the continent. He probably would put up a good fight with his friends…
"Let's take this guy to my base…" Billy said and used invisibility on the enemy as well.
The maker could teleport that guy to anywhere he wanted. Still, since Billy couldn't see any signs of powerful mana around the lizard man, he concluded that the maker opened a portal instead of teleporting that guy to the towns.
Although Billy was planning to keep the prisoner without informing his wives, he arrived in the middle of the night, so they had been waiting for him.
"What happened now… Who is he?" Kate asked, and then the others quickly followed her.
"... He is a demi human who is probably working for the enemy, he destroyed two towns in the Northern part of the continent," Billy replied after a long sigh.
"They had some different parts, but they are pretty similar to ours… Moreover, isn't he pretty strong?" Natalie asked.
"You mentioned the enemy making a special army, I suppose he is one of them… But how did he infiltrate that easily?" Sarah asked.
Billy had to explain things for a while, and as one would expect, his wives got surprised. In any case, Billy was ready to use Mind Control on that guy, but not in front of his wives. So, he decided to interrogate him later after using his weights on the maximum output and burying the guy up to his neck in a giant sphere of chromium.
After Billy left with his wives, he returned early the next morning to use Mind Control. However, much to his surprise, when Billy tried to use his powers on that guy, he felt his mana being repelled. Billy frowned when he saw that, but then he tried again. The skill failed yet again…
"The skill isn't supposed to fail no matter what, so why is this happening?" Billy wondered. "The skill can only fail if… I try to use it on things that don't have minds or even the basic levels of instinct…"