But he quickly realized that the Black Plague Bird belonged to the wind type of demonic beasts. The interaction between wind and thunder would indeed greatly benefit the Purple Electric Sword.
However, in the Eastern Wilderness, an inner core could nurture a cultivator with the combat power of the Golden Core level, even if it were just a Fake Pill. At the very least, it could overshadow the realm of Foundation Establishment.
For the Divine Wood Sect, having one more combatant of such realm meant that they could dominate the Eastern Wasteland ten years earlier.
And if given to the Purple Electric Sword, at best, the sword artifact would be happier and its might might increase slightly, but its grade would definitely not break through Rank-4.
Compared to a Golden Core level combatant, this would be too wasteful.
"I have another use for this inner core."