His gun turret was powerful enough in the Battle of All Races.
However, after all, he was firing on a planet in an unknown star system.
Nobody knew the level of technology on this planet or what special abilities and unforeseen events could happen.
So, in order to resolve the battle as quickly as possible and avoid being countered, he prepared to unleash his full firepower.
"Isn't the power quite significant?"
There was a hint of disappointment in the old man's eyes, but beneath it was hope: "No problem, young sir, fire as you please."
"This area is an unregulated zone on Alien Star, even if there is a big commotion, the Star System Federation won't interfere, nor will it come to bother me."
"Very well."
Kerr Cowell nodded in satisfaction: "However, the bombardment area may involve your castle, how strong is the energy shield of your castle?"
"I spent a lot of money on that energy shield."