'Between the Cultivation Technique and the Ancient Soul Jade, I can only pick one, and there is no need to even think about which one to pick.'
A Completion Stage Heavenly Cultivation Technique would greatly help a Quasi–Soul Transformation cultivator in his breakthrough and even after his breakthrough.
On the other hand, the Ancient Soul Jade was only a one-time consumable item, but the effects were extraordinary as it would increase the success rate of a Quasi–Soul Transformation cultivator in his breakthrough.
Almost all Quasi–Soul Transformation Realm cultivators would fail in their breakthrough. So, Ethan didn't consider the benefits a Heavenly Cultivation Technique would bring after the breakthrough.
