Regarding the spawns, their reason for stopping the attack on the defensive line was simple.
The Evil Clan had acted as a mediator.
At first, when the spawns heard the vampires' request for negotiations, they naturally scoffed.
The vampires had first taken my territory, now they succeeded in taking more, and then came to negotiate? This was theirs to begin with—negotiations were absurd!
However, after hearing that the vampires possessed the ability to destroy the entire Land of Ice Soul, the spawns realized the situation was complicated.
The vampires could overturn everything!
If driven to the edge, they could destroy the Core Flame Vein or even forcibly extract world energy, completely cutting off the Land of Ice Soul's ability to generate new Core Flame Veins.
If, as the Evil Clan suggested, the vampires chose mutual destruction, the spawns would have no way to acquire Core Flame Ore elsewhere in the short term.