Sacred Desert
Michael emerged from a twinkling Runic Gate and stepped on the soft sand that stretched as far as he could see. The Diamond Transportation Token he'd received from Eren for his first mission broke in his hand, but Michael paid no attention.
The Diamond Transportation Token was a consumable that brought him to a specific location without initiating a Link of Loyalty with someone else. Simply put, Michael managed to get to the Sacred Desert without losing his Lord Powers by linking himself to some idiotic Lord struggling to survive in the Sacred Desert.
The idiots in the Sacred Desert were part of the reason Michael accepted Eren's mission. The Saphirelake Military Academy issued a S-Rank Mission on the academy's mission board. The mission was simple; To rescue the Sacred Desert.