As for not having enough efficiency, one could make up for it with numbers, but that would require the mining tunnels to be big enough.
Given such a small area, not only did several hundred dogs have to go in to work, but when you crammed more than two thousand skeletons in there, there was hardly any room left for pits.
Accompanied by the birth of a hundred elite skeleton bosses, he compared their attributes with the skeletons he had summoned during the Blue Star era.
It must be said that within the Sea of Realms, the changes were indeed significant; the skeletons' attributes were noticeably stronger than those on Blue Star.
On Blue Star, he himself could only summon elite skeletons, and although there were mutated, enhanced versions, they were just so-so and still doomed to be cannon fodder.