Inside the iron coffin, an Iron Corpse was sealed.
Iron Corpse was one level higher than Walking Corpses.
Walking Corpses had pale and rotting flesh and contained Corpse Poison. Although fierce and fearless of death, their strength was quite ordinary. They primarily relied on their numbers and Corpse Poison to gain an advantage.
The skin of an Iron Corpse was an iron blue, much like cast iron, and their strength was greater, comparable to that of a cultivator in the initial stage of Foundation Establishment.
Crafting an Iron Corpse was more costly, and it took more time.
Similarly, controlling an Iron Corpse was also more difficult.
Only a Foundation Building Cultivator, relying on the Divine Sense of Foundation Establishment and using the Corpse Controlling Bell as a medium, could control an Iron Corpse with relative stability.
