'So, what should I buy for him?'
Even though it cost him God Essence to buy the Heavenly Stats, Ethan still planned to buy them.
Other than the fact that the Interface of Killer's Stats can only be generated three times when he revives others, having his subordinates equipped with Heavenly Stats was not a bad thing.
'Having a Perfection Stage mastery of the Heavenly Technique will increase his chances of breaking through to the Soul Transformation Realm.'
Ethan wanted his subordinates to continue their cultivation and break through to the higher realms.
So, with a Heavenly Technique, the chances of breakthrough in the higher realms would be much higher.
'Moreover, the Heavenly Fire Essence Refining Technique seems to be perfectly compatible with the Heavenly Talent: The Heavenly Fire Heart.'
Even though Ethan didn't know the exact details of the Heavenly Talent, from its name, he could tell it would further boost the effects of this particular Heavenly Technique.
