With an electronic dragon roar.
The Machinery Evil Dragon Beast's fusion triggered its second-stage transformation.
Machinery Evil Dragon Fortress of Sloth!
Its feet drilled deep into the earth like augers, firmly nailing its body in place.
In this state, it could not move at all.
But correspondingly, the Machinery Evil Dragon Fortress of Sloth could devote more energy to firepower.
Moreover, in this state, the Machinery Evil Dragon Fortress of Sloth's armor was more than twice as thick as before, and its defensive power had increased more than tenfold.
After the Machinery Evil Dragon Fortress of Sloth completed its transformation.
The combined attack of the two Dragon Kings had finished gathering.
Earth-and-fire dual attribute, Mixed Dragon Breath!
The terrifying dragon breath formed a bright yellow pillar of light that shot straight toward the Machinery Evil Dragon Fortress of Sloth.
Unable to dodge, the Machinery Evil Dragon Fortress of Sloth could only take it head-on.
Explosions of shattered earth and stone constantly erupted against the outer layer of its armor.
Yet, relying on the sheer thickness of its armor, the Machinery Evil Dragon Fortress of Sloth forcefully blocked this multi-stage assault.
It even absorbed part of the energy, gathering it into an Infinite Cannon.
By the time the two Dragon Kings finished unleashing their Mixed Dragon Breath, the Infinite Cannon had also finished charging.
It blasted out with a thunderous roar, knocking both Dragon Kings flying a thousand meters.
Struck by the Infinite Cannon's energy wave, the Volcanic Dragon King's scales showed signs of cracking all over, and threads of blood seeped from beneath them.
The Crimson-Eyed Earth Dragon King fared somewhat better. Only the thick rock armor covering its body was shattered completely.
As for the Machinery Evil Dragon Fortress of Sloth, which had endured their combined attack, its armor