In discussing Gu Yuan's current subordinates, who is most worthy of his cultivation?
Without a doubt, it is naturally the Heart-devouring Insect.
Firstly, the Heart Essence Blood and Demon Soul Spiritual Light of the Heart-devouring Insect are both under his control, enveloped by his Mana, and with just a thought, the Heart-devouring Insect would face certain death.
Through these two things, he can even faintly sense the thoughts and ideas of the Heart-devouring Insect.
It can be said that unless the Heart-devouring Insect can instantly advance to a Tier Five Celestial Demon comparable to the Primordial Image Realm, it is utterly impossible for it to resist Gu Yuan.
The terms master and servant are well-deserved.
Such a reliable tool, free of betrayal concerns, naturally holds value for nurturing.
