When the knives killed monsters, they didn't stop and waited for more to arrive. In return, they started to move up and down, expand further outward or shrink their circular area of activity inside.
In the eyes of Sith's team watching this spectacular performance, it looked as if these knives got a will of their own. But that wasn't true. No one ever heard about living knives, not even in legends or fairy tales.
"Is it a wind element?" one of his team couldn't help but ask, "but... I never saw nor heard about someone at bronze grade who could use wind element to such proficiency!"
"No, it's not," Sith knew that dude didn't even believe his words, "it's lightning element."
"Lightning?!!"
"Are you sure?"
"I never heard of any lightning element spirit masters back at the Aspire academy."
"If this is true, then he should be someone famous out there. Why didn't we ever hear about his name before?"
"Guys! It's not time for any of that," Sith knew that William was doing a marvellous job, pulling out a feat that no one ever imagined. But that also came at a hefty price, his spirit power's crazy consumption rate.
"He is overexerting himself to secure a head start for us. Let's not waste his effort and let's get in the right formation to help."
And just half a minute later, William shouted, saying the same thing Sith expected: "Get ready, I'm going to call back my knives. Just stick close to me and kill anything that I miss."
"Got it!" Sith instantly answered, while he and his team were already taking an offensive formation.
It was a seven headed star formation, one that got one of the team standing at one of its heads. At the same time, Sith, and two others stood in the centre, acting as firefighters. And these three were all gold grade spirit masters, the strongest task force the team could use right now in such an array.
William wasn't in any tight spot as Sith and others thought. He kept absorbing silver cores whenever he felt his spirit power was at fifty percent or lower.
He just had to dash forward once, then he left most of the heavy work for his knives. But he didn't want to take the full responsibility in taking down monsters. Instead, he wanted to kill monsters and claim their cores at the same time.
And so he needed Sith and his team to step in, share the pressure with him to be able to do what he wanted.
There were lots of monsters here, ranging between white, bronze, and silver grade. Luckily, there wasn't a single gold grade monster, or else he'd have to struggle and face tense situations a lot.
William retracted his knives, made them just rotate in a circle of ten metre radius, almost fifty metres away from him.
They'd take the front, and Sith's team would handle the rear. As for William, he'd stay in the middle, hunt down and collect his cores whenever he got the chance to do so.
That circle of knives worked as his real killing weapon right now. And as they got shrunk in size, more monsters started to slip by their reach and arrive to hit him and the team behind.
William controlled his knives to rotate in full circle as fast as he could, and that alone was enough to consume his spirit power by two percent per minute.
He tried to move that circle before, let it expand and shrink, move it closer and further away. And that let the consumption skyrocket to five percent per minute.
Yet he could handle such pressure. Thus, he kept doing this, controlling his knives to move from right to left, back and forth, up and down, killing lots of monsters and even cutting their bodies into shreds.
This bought him a little time to collect the fallen cores from these monsters, saved him lots of time needed to dissect these monsters to get their cores as well.
With every core he got, he knew he gave himself extra minutes through replenishing his spirit power.
But the monsters that slipped by started to cause a little headache for him.
"If I can, I have to forge more of these knives," William was using the twenty knives he forged before.
Back then, he was barely able to use even five of them. But right now, if he got fifty, he could use them freely and without any pressure.
Most of the spirit power consumption was taken by his attempt to increase these knives' speed. To do so, he had to infuse them with his lightning spirit element, just like how Sith guessed it.
And that was to make up for their low count, make them travel faster and cover more distance. If he got more, he would have spent less amount of spirit power in return for the same result.
Not to mention his killing speed would skyrocket as well.
Things went on like this, William took the lead, moving his knives in a circle of death with himself at the centre. His knives didn't just kill and hack monsters into shreds, but also, they worked their magic over trees and bushes all around.
It looked like he was giving this part of the forest a little makeover, leaving behind a long trail of dead monsters and broken trees.
Just one hundred metres behind him, Sith and his team were struggling to keep up. When William retracted his knives, they took care of the side and rear, dealing with tons of monsters.
Even when there were ten of them, they struggled to keep the same killing speed as William.
That wasn't thanks for William being strong, but thanks mainly to William's weapons. Also, he was efficiently using his spirit power, replenishing it without any worry as he replenished and added more cores while fighting in this way.
As for Sith's team, they couldn't mimic what William was doing. Even if four of them got gold grade gears, only two got gold grade weapons out of these.