Overlooking the now land of the dead, Ye Xiajie asked Xia Jieye to come over for a while and used his drain ability to take all the life energy the corrupted god had gathered just now. Xia Jieye didn't need to come personally, Ye Xiajie just needed to temporarily make a connection between his dominant soul and the soul core.
The long term is not advisable as Ye Xiajie's soul is lacking one major soul fragment to fully merge with his soul core which is Xia Jieye. But even if their souls haven't completely, the connection between the two of them is finally having some resonance especially now that Ye Xiajie's control over the abyss is slowly getting stronger.
Drain ability is just a special skill Xia Jieye achieved as a Yaoguai God. The two could temporarily share a body.
Ye Xiajie said, "I know you can hear me. Drain all the life force from this Corrupted God. I need to give that energy to Jing'er."
