After sending his father to the Main Headquarters of the Shadow Union, Thirteen returned to Pangea through the Order of the Apocalypse.
The teenage boy could return to Solterra at any given time if he first teleported to the Order of the Apocalypse and asked Metatron to open a gateway to the place where he intended to go to.
However, he could only use this special service once a week, and there was also a limitation.
He could only be teleported to villages, towns, or cities that were not under the influence or control of the Wanderers like the Human Kingdoms ruled by the Five Monarchs and Ten Prestigious Families.
Since he was short on time, he decided to use this method to send his father to the Main Headquarters of the Shadow Union.
After the battle in the Arcadia Archipelago, his relationship with the Order of Raizel improved, good enough that he could ask favors from them.