To take one of the Outposts in Biomutant's starting biome, you'll need to stir up three Moth Nests which are located deep underground. The third Moth Nest can be tricky to reach if you did not follow tutorial instructions closely.
You are just entering the underground section below the Outpost, smashing the first and then the second Moth Nest as well as some enemies along the way. Suddenly, you find yourself in a much bigger room underground with another round of enemies and one bigger foe.
Once you beat these fellas, you will see an entrance that leads to the third Moth Nest that you need to destroy to complete the Outpost takeover. However, this entrance to the third Moth Nest is blocked by a concrete wall with yellow paint and you need to destroy it to get to the Moth Nest.
This is a fairly simple task but if you don't know what you're doing you will probably be stuck for quite some time in this underground room. Luckily, we have the solution to the problem.
To destroy the wall, you need to select the Old World Klonkfist melee weapon from your melee weapon wheel. Once selected, approach the wall and charge the special attack (hold the right mouse button on PC), which will break the wall.
Again, this one is fairly simple but it can be frustrating if you did not pay attention to the early tutorial that introduced you to the Old World Klonkfist.
Biomutant is available now on PC, PlayStation 4, PlayStation 5, Xbox One and Xbox Series X|S.