The Esteemed Wraith Savia Rostodon.
This was one of the first products of the Nissians' initial foray into kicking down doors and also the last one with an endless affliction.
Among the many lost souls of the Cavern of a Thousand Spirits, he was the most cunning, sinister, greedy, yet cautious being.
Even when a level-nine Evil Spirit had once charged directly into the Saint Xiting, he could have joined in to deal the finishing blow and possibly take over Niglaiser completely, thereafter the sky would be his limit, and the ocean depths his playground, availing himself of the opportunity to rival the Holy Temple.
But out of caution, he didn't do that and instead chose to watch from the sidelines, seeing his teammates go up to their doom.
The later developments proved that this cautiousness might have been correct—the Chief Priest at the time directly invoked the gods to open a portal to the Shadow Realm and sent the Evil Spirit where it belonged.