After walking out of the 'sweet district', Max and the group headed toward the artifact market. He first wanted to buy the communication crystals.
He didn't like the feeling of not being able to contact his loved once if they were far away. Because it had been more than a week since they came out to search for Rima and he knew Anna should have returned from her monthly mission by now and she must be worried about him.
He very much wanted to contact her and tell her he was alright but there was no way he could do it since he was so far from the academy.
He could send a letter, of course, but it would take many days and by the time it reached the academy, he would already be there, so sending it now was useless.
Therefore, he thought of buying the communication crystals since he had more than enough Mana stones and was also in one of the largest trade markets in the Green Leaf kingdom.