The amount of soldiers he has might be large but compared to an entire world, it is nothing, with this place as a natural barrier for his group, he could rest in peace and build a territory that would function as their base in this world for years to come.
He suddenly froze and sensed a couple of auras that are approaching their group, his eyes narrows and prepare himself for combat, then more auras that seemingly have the same origin as the first one started appearing one by one.
Gigantic Octopus with tiny horns on their heads started popping out, the darkness doesn't bother the undeads, they could clearly see their opponent in this deep place.
Sans took out his weapon and thrusted it towards the octopi, they responded with their tentacles, the two forces collided and they were actually equal in terms of pure brute strength.