Evil forest(overworld)

This is a forest that would be very dark (yet no mobs spawn, in fact, many mobs that spawn outside the biome keep a distance of 20 blocks away, and prioritize that over attacking the player) and eerie. It would also be very thick, with considerably large trees, half the height of a giant spruce and has a trunk width consisting of maximum 5 blocks, that are very close together. These trees would have black leaves and wood and will be very twisted(along with the grass). There would be a constant fog hanging in and around the forest. No crops will grow in there, and the water makes you slow and sometimes damages you. At night, the trees would try to attack you(and everything else), immobilizing you and dealing damage. You can retaliate with an axe. In the forest, there could be dark houses with dim lights, guarded by invisible spirits. An invisibility potion offers no protection, but you will be able to see them. The spirits are strong and have a lot of health, but the loot inside the house should be very rewarding.