The cave of the Evil Eyes was narrow at the entrance but wide inside, roughly triangular in shape. Marvellously, there was a circular arc-shaped mud wall fifty steps away from the entrance, presumably a defensive mechanism for the wild Evil Eyes.
The mud wall was sturdy and at the perfect height for the Evil Eyes to duck behind and avoid the long-range attacks of their enemies. Standing up, the Evil Eyes could then observe the situation before them. If there was a large number of Evil Eyes here, the enemies would not be able to charge into the cave no matter how powerful they were.
Yang Ling praised his good luck after understanding the terrain within the cave. If not for his Evil Eye army quickly occupying the high vantage points and killing the high level wild Evil Eyes responsible for commanding the rest of the Evil Eyes, even he might not have had an easy time attacking this cave.