The Fira Dragon howled in pain even though it was relieved from the strangling of the Quacken. The massive battery gun barrage had been putting holes in the Mecha Fira Dragon that it would render it incapable of flight soon enough.
Thus, it had decided to activate its hidden trump card that it did not wish to use against such foes. The Fira Dragon's AI logic wished to keep it hidden from a more difficult foe but the quantity of attacks it had suffered made it feel that it should use it as soon as possible.
Its eyes shone purple lights the moment the AI within it decided to trigger the hidden trump card, allowing the massive regeneration of its body. At that instance, the admiral of the Battle Airships had determined that the use of laser cannons was needed to burn the Fira Dragon down from the sky as the main battery guns were not doing sufficient damage to it.