After making his choice, Gu Xi felt a flash of insight. He now understood the effects of Soul Return Road and Undead Body Soul Lock.
Soul Return Road was unlike Yellow Springs Road; it was not actually a road.
Instead, it transformed the properties of the ground.
It was somewhat similar to the Death Sorcerer Force Field Gu Xi had used before.
However, the Death Sorcerer Force Field was cast by a Death Wizard to turn a patch of land into Underworld nether soil.
Soul Return Road, on the other hand, gave Underworld nether soil the property of restoring health.
It could be considered adding an attribute to Underworld nether soil.
The overall feeling was like Gu Xi planting Nether Spirit Flowers along his own Yellow Springs Road.
The Nether Spirit Flowers would definitely affect the properties of Yellow Springs Road, but no one could say that stepping on Nether Spirit Flowers meant one was no longer standing on Yellow Springs Road.
Soul Return Road worked in just such a way.
The land transformed by Soul Return Road was still Underworld nether soil.
It merely strengthened the land's properties, allowing Gu Xi's undead to replenish their life and mana as long as they stood upon it.
As for the seven-day time limit, Gu Xi was not too bothered by it.
He only needed to set up Soul Return Roads at several crucial locations. When a major battle truly came, he could arrange for his troops to stand there.
If that still was not enough, he could use these Soul Return Roads as emergency aid stations.
What surprised Gu Xi most was that he did not need to personally work himself to the bone to set up Soul Return Roads.
The Yin Envoys under his command could do it as well.