"The third battle group, the Steel Battle Group, is mainly made up of alchemical creatures. When I have the chance, I'll buy more alchemical creature blueprints and hire some alchemical wizards to develop more mass-produced alchemical creatures. Different alchemical creatures will be reasonably matched to form my Steel Battle Group."
These three battle groups were Levi's initial plan.
He wasn't acting on a whim, but considering that he had already given birth to the Divine Ring Tower.
In the future, he would build his own wizard tower.
Otherwise, it would be a waste of the Divine Ring Tower's trump card.
The wizard tower needed the corresponding guards and strength to form a battle group to guard the wizard tower in advance. It could be considered a precaution.
Moreover, if Levi wanted to explore other planes, he could not be alone.
To become a Plane Lord, one had to have their own forces and army.