The so-called exchange of lives meant that both sides sent out half-step Celestial Immortals for a fair duel to the death. With no one else intervening, they would fight until one of them perished.
The last one standing would obtain the other's Source of Dao, thereby achieving a breakthrough in cultivation.
Generally speaking, one-on-one exchanges of lives were exceedingly rare, because such a battle tended toward fairness.
Yet in a Dao Tribulation, it had always been a matter of whose fist was bigger, whose side had more people and greater strength. Everyone would beat their enemies to death, and the stronger side would never agree to a one-on-one exchange of lives.
The four major powers had chosen a fair exchange this time primarily for two reasons.
First, neither side was confident it could swallow the other whole without suffering losses.
Second, the Guixu Immortal Alliance was simply too powerful. If they did not choose to exchange lives and instead continued their desperate battle, then even if they won, both sides would be left grievously wounded, only to be swept away by the Guixu Immortal Alliance in one stroke.
This time, the four major powers had exchanged lives with one another. Although more than half of their half-step Celestial Immortals had fallen, those who survived had also made tremendous progress in strength.
"Nirvana Dragon Demon Venerable, Purpleflame's Ninth Divine Son, the seventh true successor of the Heavenly Luo Ancient Sect, and Sun Gan, a direct descendant of the Eternal Life Ancient Clan."
Chen Nianzhi listed them one by one, his expression stern as he said, "All four have forged Three Taiyi Foundations."
"Among the four major powers, those experts with only a single Taiyi Foundation have essentially all been wiped out. The survivors have basically broken through to Dual Taiyi Foundations."