Boom, boom, boom!
Ye Feng had just arrived at the top of the city wall when he saw a 30mm self-propelled cannon crazily unleashing fire at the base of the wall.
Ye Feng was familiar with this newly developed cannon, its rate of fire could reach 1500 rounds per minute, and it was capable of inflicting lethal damage on Fourth Order Mutated Animals or below.
It also featured automatic enemy locking; when multiple units were used together, they could form a fire network through computer coordination for combined combat.
From inception, this weapon was positioned as a mass killer on the battlefield.
Because most of the Mutated Animals were still at the Third Order, it would at least take until the next Spiritual Energy Resurgence for a large-scale breakthrough to Fourth Order.
And this self-propelled cannon could even effectively kill Fourth Order Mutant Animals.