Whether it's a beehive fortress or floating cannons, both will consume a large amount of magic power.
The magic power of an ordinary Level 1 Mage is simply unable to sustain the cohesion of a large-scale floating cannon array for combat, but for Duke, it is quite suitable for his magic.
In his current state, Duke has no problem controlling a cluster of a thousand floating cannons for combat. With this, he can dominate among Level 1 Life Forms, and even dealing with some Level 2 Life Forms isn't an issue.
The only problem is that the current floating cannons are still too small. When his strength increases, if each floating cannon can possess the real power of a magic-guided cannon, they would truly become walking war machines.
Duke stayed at Anvil Castle for another week, mainly to collect and purchase some materials and magic models he needed.
These magic models may not be needed for the time being, but he bought them to keep on hand for when they're needed in the future.
