Before binding the system, Vaan had been feeding the Heaven-Swallowing Space with all the mana he collected from pleasuring witches without a choice.
Increasing his Heaven-Swallowing Space further brought little benefits in comparison with the remaining two options.
'With a little bit of fire-attribute mana and a slight chance, I was able to awaken my eye's special ability. This time, there's a moderate chance of awakening a special ability related to my sense of touch with earth-attribute mana,' Vaan mused.
'What to choose…'
In Vaan's opinion, the first two options were equal in value.
If Vaan increased his earth affinity, he would receive more blessings from his Earth Spirit Body.
Furthermore, he could reap bigger gains when obtaining more earth-attribute refined mana from other Earth-attribute Senior Witches.