Compatibility
Seeing Seron's behavior, Jason couldn't help but feel weird.
Even if it was true that he wanted to support Seron in his choice, it was not as if he would simply pick his friend's soulbond.
There was also the possibility that the Earth Dragon egg with the best potential would be worse for Seron because their compatibility might be bad.
In the end, the potential of a beast was just an indicator of the limits of its mana core rank, which could even be enhanced later on.
Thus, Jason thought that it was more important for Seron to trust his gut feeling and choose the Earth Dragon egg he felt the most compatible with. Doing this might help him in building a fortified soul conjunction faster than with the chosen egg.
Both his masters had told him the same when he had asked them what he should pay attention to if he were to pick a new soulbond.