It's only dirt. Push hard and it will give way.
Nothing. The wall is dirt and you can push right through it.
the dirt wall is in moredreds layer
The wall on the left is made of dirt, not rock, and if you push hard it will collapse.
In Mordred's underground laboratory, the wall to the left is just dirt and can be pushed down.
The wall is only loose dirt. Keep pushing until it gives way.
You have to push it open.
You keep pushing until it finally collapses (it is dirt, not rock).
In the left corner of Mordred's lair.
In Mordred's underground laboratory, the left wall is made of dirt and can be pushed through (with a little effort).
In Mordred's underground lab, the wall is just dirt. Keep pushing and it will collapse. This is the back way to the dungeon.
In the underground laboratory of Mordred, the wall to the left is not rock, just dirt. Push hard against it and it will collapse. (see related question)
There isn't a special technique. Fend 4 yurself