The City of White Raven.
Eren occupied his private workshop, which doubled as both his potion laboratory and secluded training space for honing his Ranking Technique.
Here, the ambient atmosphere pulsated with an array of elemental mana, its potency augmented by the presence of exceptionally scarce Mana Blessing stones, painstakingly procured from far-flung corners of Anfang.
These Mana Blessings, designated as B-Rank rarities, were a coveted prize, so scarce that only a lone Master Ranker out of hundreds could lay claim to their possession. And yet, Eren had amassed a staggering collection of nine Mana Blessings, an extravagant luxury that eluded the grasp of the typical Master Ranker.