Rimuru was panicking.
With Ling Ling charging ahead in such a fierce assault, it was genuinely hard for him to hold back... After all, he had single-handedly taken on Arsenal Nation not long ago. It would be hard to explain if he suddenly started slacking now.
Fortunately, since this was a charge assault after being surrounded, it was essentially everyone braving enemy fire and rushing into their "weak point." They could still maintain some coordination while fighting back. Magician and the others handled protection, while Ling Ling and the others cleared obstacles. But once they charged into the mass of enemies, the formation completely fell apart.
The NPCs attacking together forced everyone to scatter—it couldn't be helped. If a dozen people were facing several thousand, they might still have been able to firmly establish a defensive line and keep everyone outside their formation. But against tens of thousands, or even several tens of thousands, the charge of such a dense crowd would directly tear apart a team of barely more than ten people, leaving each person simultaneously attacked and surrounded by dozens.
And if they stayed too close to one another, they would only hamper each other, making them afraid to use large-scale area attacks. This wasn't a game with things like friendly-fire immunity.
So everyone naturally spread out somewhat. They all realized that breaking out as a group would be even harder; it was better to escape individually and regroup afterward.
Besides, the more people who got out, the more freely those remaining could unleash powerful moves—though none of them wanted to waste energy on this bunch of NPCs.
Since he was immune to physical attacks, Rimuru only needed to watch out for some ability users and high-tech weapons. He unleashed a burst of frost, Water Blade turning into