More than ten behemoths were rushing towards them. These figures, which were covered in dark purple scales, turned out to be Bone Dragons that, when they opened their huge wings, were as large as mountains.
A magnificent and domineering aura radiated from the Bone Dragons, making it hard for the human experts and common Demonic Beasts to breathe.
The Bone Dragon Clan, one of the three overload clans among the monster population, had arrived.
"Bone Dragon Clan!" Crystal-armored Monster Emperor was surprised.
The three overlord clans were the Bone Dragon Clan, the Crystal-armored Monster Clan, and the Demonic Ape Clan.
The Bone Dragon Clan ranked first as its overall strength was higher than that of the Crystal-armored Monster Clan. What's more, Bone Dragon Emperor was an immortal being whose age was known by nobody.
In the entire Ancient World, few people could compete with him and he was much stronger than Crystal-armored Monster Emperor.