Event on Colossal Cavern

Hmmm. This place is larger than it looked. As you scan the cavern up ahead, you see some sort of industrial activity. Suddenly, a pack of Green Dragons sweeps down to block your way. The largest speaks in fiery breaths, "So you've slain the master! So you think! Like all puny humans your vanity clouds your vision. How else could you conceive that we Dragons would serve other than the Dragon Lords!"