Turns the once peaceful biters into different factions, warring for domination over Nauvis alongside the player. They will fight amongst themselves for land.
You can quickly test it on an existing save. When it starts up for the first time it will process all scanned chunks so be aware it might lag for a second or two right as it loads but then it should work fine for you.
Note that large bases will suddenly turn on each other which might cause further lag lasting minutes depending on how large the explored map is