The wind guardian's scales started falling one by one and some of them were forcibly removed as some of the patches of the dragon's skin is currently bleeding. With both hands of the dragon has been severed, the dragon's strength has been diminished a lot due to the constant bleeding and it's getting a lot worse as time goes on.
"Don't let up the attacks Bladeheart! The dragon is now getting staggered!"
The big dragon can't withstand the barrage of cannonballs as it can't even dodge away without removing the remaining bindings on its wings, neck, tail, and legs. All it can do is fire multiple [Wind Blades] while it is trying to remove the chains from its wings. If I am assuming it correctly, once the bindings on its wings are removed, then it can unleash stronger attacks as it is prioritizing the wings first instead of its legs to escape.