At the heart of Sein’s territory in Purgatory, a stone castle stood tall, its architecture mirroring those in the Magus World.1

Constructing it had taken Sein half a month of effort.0

Beyond enlisting the demons in his territory as laborers, Sein had also summoned geo elemental creatures to assist in the process.0

The Geo Elemental Summoning spell was something he had mastered during his studies in Sky City.0

Back when he was at the peak of Rank Two, his mentor had urged him to expand his mastery beyond a single spectrum of magic.0

Now, not only had he honed his control over geo elemental magic, but he had also developed proficiency in various other elemental magic, wielding them effortlessly with both hands.0

This newly built castle would serve as Sein’s residence...0