After six hours, they would either collapse or be dismissed.
But after being tamed by Doggy Two, the Land of Bone could provide these skeletons with energy, sustaining their existence.
However, the maximum amount that could be sustained was only three thousand.
And this was only achievable by sacrificing the birth of new skeleton energy to ensure the supply of 3,000 skeletons.
Any more than that, and the Land of Bone wouldn't be able to support it.
Of course, this only means that Dean McKenzie can't store more than 3,000 skeleton soldiers for long.
If he wanted to keep improving his skill proficiency, it actually wasn't a big issue.
He just had to get rid of the skeletons.
Even continuing to summon them in the Land of Bone would be fine.
If the energy of the Land of Bone couldn't sustain them and the skeletons collapsed, it didn't affect Dean McKenzie, even if he didn't banish them.
Regardless, Dean McKenzie stopped nonetheless.