Star realm.
Although the direction pointed by that elder of the Sorrido Clan was the Ethereal Tower, Horn could still understand that he was actually referring to the star realm.
According to Fagius, undead magic, as the name suggests, uses the magic of awakening the undead.
Essentially, it involves refining bodies that have recently died and are still relatively fresh into "flesh machinery" similar to spring mechanisms.
Then, the undead are summoned and driven to enter these skeletal zombies.
As for where the undead come from, similar to magical creatures, they all come from the star realm.
Interestingly, according to this elder of the Sorrido Clan, there were records of the star realm and spirit realm during the El Empire period.
Horn also read descriptions of the star realm and spirit realm in the "Emerald Record."
Countless worlds float on the river surface, like bubbles formed by the agitated water flow.
