Jason was unaware of how fortunate he was with the question which he asked the two students from the Aerda school who were also blacksmith apprentices.
The Mythic Garden was considered a national treasure from the Jual Clan that was only open for a few clans and families who have an alliance with the Jual clan.
Nevertheless, there were also other clans, companies and so on that were invited to enter the Mythic Garden upon being invited.
This was the Jual clan's scheming to lure these clans and companies into the alliance after they understood how precious the Mythic Garden was, allowing the Jual clan to demand valuable goods in return for the opportunity to enter the Mythic Garden!
If Jason had asked something different or not concealed his mana core and fluctuations, he would probably be laughed at by the two students before they would have reported him.