A monstrous beast crawled out of the Molten Lava Abyss and opened its mouth to emit a roar that shook the mountains, targeting the creatures inside Black Stone City.
Everyone's eardrums ached from the roar as they all turned their heads to look.
They saw a dragon emerging from the Molten Lava Abyss, a dragon with four claws and wings.
Upon seeing the dragon, Lu Heng immediately recognized what type of dragon it was.
It was a Purgatory Sub-Dragon.
This Purgatory Sub-Dragon, standing ten meters tall on all fours, had a dark red body. Its scales resembled cooled molten lava, each one containing enough heat to melt steel.
Its eyes were like two unquenchable flames. When it roared, the scalding heatwaves swept through the entirety of Black Stone City.
Its tail, immersed in the molten lava, caused the magma to surge endlessly with every sway and splash with each strike.
"Dragon! There's a dragon in Black Stone City!"
Upon sighting the Purgatory Sub-Dragon, the human superpower users immediately cried out in surprise.
Not only were the humans surprised, but the Black Iron Dwarfs were equally astounded.
Darkville wore an expression of disbelief, as he remembered there being no dragons in Black Stone City.
Had there been a dragon in Black Stone City, he would have mentioned it while discussing the attack plan.
Although Lu Heng was also amazed at the appearance of the Purgatory Sub-Dragon, he remembered the monstrous roars he had heard while escaping from Black Stone City through the Molten Lava Abyss the first time.
The Black Iron Dwarfs didn't know about the Purgatory Sub-Dragon, which meant it appeared after the Bloodline Demons took over Black Stone City.
Judging by the body size of the Purgatory Sub-Dragon, it wasn't very old; three years ago, it would still have been a juvenile, but now it had grown to this extent.
Purgatory Sub-Dragons preferred hot environments, and the Molten Lava Abyss of Black Stone City was undoubtedly their favorite habitat.
Piecing these bits of information together, the origins of this Purgatory Sub-Dragon could be hinted at.
Bloodline Demons were raising dragons!
The Purgatory Sub-Dragon was among the most powerful creatures in the Abyss World.
Moreover, such creatures retained a certain level of loyalty towards those who raised them.
That meant if the Bloodline Demons raised the Purgatory Sub-Dragon, then it would become the guardian beast of this territory.
Occupying Black Stone City, raising dragons, and possessing the strength of an Assassin Lord Level Great Demon.
Putting all this together, the situation was clear.
Assassin intended to occupy Black Stone City, raise this Purgatory Sub-Dragon, and then claim the Molten Lava Plain as his territory.
Once he had a territory, he could use his Royal Family status to advance to an official Lord Level Great Demon.
Without a territory, he would have to remain a Lord Level Great Demon in name only, unable to truly ascend.
Once he ascended to Lord Level Great Demon, this Purgatory Sub-Dragon would serve as the monumental guardian beast of his territory.
This also explained why, despite their aversion to heat, Bloodline Demons chose to occupy Black Stone City.
Because the Purgatory Sub-Dragon liked it.
Assassin chose Black Stone City for the purpose of training this Purgatory Sub-Dragon.
The growth rate of this Purgatory Sub-Dragon was also incredibly fast; it grew to this immense size in just three years.
Given a few more years, once the Purgatory Sub-Dragon fully matured, there would be no need for Bloodline Demons to intervene.
The Purgatory Sub-Dragon alone could flatten Dili Castle.
Upon the appearance of the Purgatory Sub-Dragon, everyone temporarily lost their senses.
The moment Bloodline Demoness Salein heard the roar, she immediately flew toward the Molten Lava Abyss.
As the Purgatory Sub-Dragon climbed out, she landed on its head, raised her hand towards the nearest Black Iron Dwarf, and ordered, "Tear them apart!"
The Purgatory Sub-Dragon roared loudly, spewing a stream of fierce flames that engulfed all the Black Iron Dwarfs in front of it.
While Black Iron Dwarfs naturally possessed strong Flame Resistance, they couldn't withstand such intense Dragon Breath and, screaming, scattered to find cover.
Perched atop the Purgatory Sub-Dragon's head, Salein laughed wildly, "Kill them! Kill all of them!"
The Purgatory Sub-Dragon charged into the crowd, like a tiger entering a flock of sheep, with no one able to stop such a massive creature.
Each swipe of the Purgatory Sub-Dragon's claws and each flick of its tail sent human superpower users and Black Iron Dwarfs flying.
Such a massive creature was extremely difficult to confront.
Seeing the humans and Black Iron Dwarfs scattering, Lu Heng knew he had to direct them in combat, or they would be crushed by this colossal beast.
"This is a Purgatory Sub-Dragon, everyone listen. Form up in a circle around it! Keep a distance of more than ten meters."
Having seen Dragons before, Darkville knew this tactic was correct and began repeating Lu Heng's orders.
Lu Heng, sword in hand, stood directly in front of the Purgatory Sub-Dragon and continued, "The Purgatory Sub-Dragon has two major attacks, the first is Dragon Flame Breath, and the second is tail sweep."
"Its tail is ten meters long. Keep a distance of more than ten meters to avoid the tail sweep."
"Dragon Flame Breath is more problematic. We need to artificially create barriers. Bring large stones, war chariots to form barriers, and hide behind them during the breath phase."
"All warriors possessing Energy Shield Skills should gather, and if necessary, activate the Energy Shield, combining the energy of all shields to withstand the Dragon Flame Breath."
Orders were relayed one after another.
Black Iron Dwarfs had been fighting Bloodline Demons for three years, and every one of them had rich combat experience.