Kahn commanded Blackwall who was flying 20 kilometers away above a battlefield to act. The Kronos general then descended on the ground and placed both his palms and activated the Terrain Manipulation skill.
The reason why no one was able to find the leader of this monster army was because they only searched on the surface terrain.
Both Blackwall and Kahn had the Earth Sense skill which they got from the Mountain Titan in Verlassen, so they had found the location of the leader a few minutes ago.
It was hiding 5 kilometers deep in the ground in a network of tunnels and could command the army telepathically while being completely undetectable as even a 5th-stage saint couldn't search that deep in the ground unless they excelled in use of Earth element.
