Wading through the Dead Marshes would be a lot easier without those giant insects.
The vast number of large insects makes any progress difficult and cannot be easy for any other life.
Defeat a good number of insects in the Dead Marshes.
The number of large insects in the Dead Marshes is almost unbearable. Their numbers should be thinned.
You should defeat a number of insects in the Dead Marshes.
You have defeated a number of insects in the Dead Marshes.