The Dead Corpse Dragon Spirit is a mystery unique to the Dragon Clan; even Jiatiange, which has existed for tens of thousands of years, merely knows of its existence but not its essence.
It is neither a form of possession nor a resurrection through borrowing a corpse, yet it can influence the consciousness and beliefs of its host, compelling them to align entirely with the former existence of the Dead Dragon.
If one must define it, the word "curse" might actually be the most fitting.
A curse from the Dead Dragon.
However, from another perspective, Dragon Spirit could also be called a blessing.
While the host's subjective consciousness will be distorted, their frail flesh will transform toward the likeness of the Dead Dragon, making them acceptable to the Ancient Abyss Dragon Clan.