Sirius's thoughts wandered as he mulled over the lesson.
'Citadels in the depths of the Abyss, huh?'
The topic of the day had been a curious one. Citadels—massive strongholds scattered throughout the Abyssal Plane—served as waypoints for soul weavers to launch their counterattacks against the Abyssal Shades. These Citadels weren't just relics; they were the backbone of humanity's defense. It was said that the Elysium, through these bastions, managed to push back against the relentless tides of Abyssal invaders.
But for all the information about them, some things didn't sit right with Sirius. His brow furrowed.
'Is the Abyssal Plane really that small that we can make any significant impact? If it is, why don't the Abyssal Shades just wipe the Citadels out?' he mused, his mind swirling with questions. 'And what about the god-level Abyssal Shades? What keeps them from attacking these strongholds?'