The entrance of the fourth layer of the Earth Fire Demon Cave.
He Yichao led his subordinates to ambush by the entrance connecting the third layer to the fourth layer. More than a dozen senses were spread throughout the entrance, ensuring that not even an ant could pass unnoticed.
Anyone passing through the entrance could feel multiple senses scanning them. Feeling displeased internally, they had to suppress their annoyance and quickly leave in the face of so many Sea of Qi Realm experts.
So many Sea of Qi Realm experts blocking the entrance between the third and fourth layers must have a purpose. A great battle might erupt at any moment, so it's best to avoid it.
To prevent the situation where Lu Yu had already left the fourth layer, and even the third layer, rendering their half-day watch fruitless at the fourth layer's entrance, there were people monitoring the entrance to each layer.
