Against the Four Elders

As soon as the last sixth-level spiritual vein master died, a smile appeared on Katsumi Barlow's lips.
"System prompt: Congratulations to player Katsumi Barlow for reaching the upgrade requirement and increasing his level by one. His current level is Spiritual Vein Level 4!"
Because of the cross-level kills, these thirteen Lu family spiritual vein masters either brought Katsumi Barlow 5,000 or 10,000 points of kill experience each time.
Adding up the thirteen people, the experience Katsumi...