Arthur only stayed briefly before leaving. After all, he didn't want to go to the party in the first place because he didn't think that the party was important to him.
Whether it was the successful advancement of the four of them or the failure of the four of them, none of them was important to him, so he didn't care about the party.
The main reason he showed up at the party was to show his face and to see the nascent soul pill up close. After showing everyone that he attended the party and satisfying his curiosity about what the nascent soul pill appears like, he left the party.
He left to continue cultivating with heavenly lightning. And when he got bored or too tired doing that, he rested by learning how to make a superior logic unit.
Cultivation had become more difficult since he advanced to the fourth transformation, but thanks to the daily baptism of heavenly lightning, he was able to experience progress in his cultivation every day.
When Thor heard that he was making quick progress by cultivating with heavenly lightning, Thor also began a cultivation frenzy. By cultivation frenzy, Thor was creating and refining a better and stronger energy core. So Arthur called him a hack and a cheater.
A month after the party, news arrived from the League of World Eaters about the request to invade the two worlds. The news was that they had received permission to invade the two worlds.
The four peak golden core elders had begun their advancement by now, so they wouldn't be available for any invasion for a while. Besides that, the people that Sword Flash had called to come and assist them for the invasion of the gem people hadn't arrived yet either.
This combination of an internal lack of manpower and an absence of external assistance led Sword Flash and the other two patriarchs decide to postpone the invasion for a while.
But the three of them changed their minds five months later when Arthur successfully advanced to the peak of the fourth mortal coil. They decided to let Arthur lead the invasion of the small world similar to Aries.
They didn't change their minds because of one peak-stage golden core cultivator. A single-peak stage golden core cultivator is unlikely to make much of a difference in the invasion of an entire world.
This is why they didn't let the invasion go ahead when Thor advanced to the peak stage of the golden core realm even earlier than Arthur. But they changed their minds this time because the single peak stage golden core cultivator is Arthur.
They are not being preferential when they changed their minds because of Arthur. The only reason Arthur was able to change their minds was that he was much stronger than the other golden core cultivators.
In fact, the current Arthur was much stronger than Void Claw and might still be stronger than Void Claw once Void Claw advances to the fifth mortal coil. It was because of this kind of power that they were comfortable letting him lead the invasion, just like Void Claw did for the invasion of Aries.
They didn't force him to invade the small world, though. They didn't force anyone because some of their helpers had arrived. The participation in the invasion is entirely voluntary now that they don't need everyone.
Arthur decided to lead the invasion because he wanted to earn enough contributions to purchase the nascent soul pills that he needed to advance to the fifth mortal coil. This is the same reason why Thor decided to participate in the invasion.
After the decision was made, information about the small world that they would be invading was given to them. This way, they would know what they were walking into and would be able to prepare for it.
The world that they are invading is called Aurora. It is a world that has fallen under the control of the gem people for quite a while. They even use Aurora to launch invasions of other worlds.
Apparently, Aurora is a garrison world for the gem people. They have fortified the place even though it is a small world. This is because they use it to initiate invasions of other worlds, so it is constantly attacked by the worlds that they invade.
Its duty as a buffer world used to tank the revenge attacks of their enemies is why Aurora was used to contact Sword Flash. So Aurora is a world that is thoroughly prepared for a retaliatory invasion.
But no matter how prepared and garrisoned Aurora is, it is still a small world. This means that it can't produce fourth mortal coil beings naturally. So the maximum power limit is still 100C.
One piece of good news about Aurora is that its world spirit is much weaker than the world spirit of Aries. The world spirit can't elevate an inhabitant of the world while actively attacking the enemies of the world.
The world spirit became silent and inactive after it shared its power with an inhabitant of the world in order to resist the gem people. The world spirit prioritized elevating the strength of an inhabitant of the world instead of attacking the gem people directly because a living person was more intelligent and more versatile than it was.
Another piece of good news is that the original inhabitants of Aurora hate the gem people and should help the Blood Skull sect wholeheartedly.
But this good news might be canceled out by the fact that the Blood Skull sect intends to plant a mana seed in Aurora. This is because the world spirit will surely hate them once the mana seed grows into a domain of Ethera.
They don't see how the indigenous people of Aurora will help them after they plant the mana seed. So in the worst case, their enemies will be a combination of the prepared gem people and the inhabitants of the world. But Arthur and the patriarchs weren't worried about this.