He Ao did not enter the tower directly but stood outside the iron gate of the tower, closely examining the crack in this solid, heavy gate.
The crack was in the seam of the gate, about three meters tall, with its widest point near two meters from the ground, and around thirty centimeters wide. The fissure caved inwards, as if it had been violently smashed open by some creature.
In comparison to the massive metal gate that was nearly forty meters wide and sixty to seventy meters tall, this crack was not particularly big.
But the crack was large enough for smaller creatures and people to pass through.
A tall man, by merely turning sideways, could easily slip through this crack.
He Ao squatted down and carefully observed the shape of the fissure.
"What's wrong?"
Liu Nan's voice suddenly came from behind.
