The communication system in the death realm was far more complex than that of the Human World. Often, the empires that controlled the death realm couldn't transmit information over long distances, and many regions had to rely on point-to-point communication, which was very troublesome.
Rio was well aware of the importance of the Dragon Grave Mountain range. Leading a team composed of high-tier undead warriors, undead chant masters, and other high-tier undead, he rode through the night on his undead warhorse, heading straight for the Dragon Grave Mountain Range.
Even so, it was already the next day by the time they arrived at the Dragon Grave Mountain range.
Upon entering the Dragon Grave Mountain range, Rio looked up into the sky from a distance, his eyes narrowing as he noticed something unusual.
That was...
The undead Bone Dragon!
But it was different from usual.