Tree mutation: Roots - Youāre slowed down, and if you stand still too long on grass you root yourself (if not winter). Being rooted provides water/nourishment, and if you have a thick bark or something you can survive winter (nullifies temperature effects). If you survive rooted long enough, you release mini-yous. Maybe if you get beaten badly enough by a bear or something you can unroot yourself, with massive leg damage. Perhaps unrooting by yourself instantly breaks your legs.
Fungus mutation: Sessile - Basically the same thing, but maybe you donāt need to be on āgroundā to survive, you just need a place with wind. Maybe on concrete and stuff you just have very slow speed.
Trait - British - morale boost for driving. If you spend seasons++ in the same car you actually lose morale. Can craft a manual shifter, activate with ^ to switch gears. Extra morale boost from reading Top Gear.
Psychopath 2 trait - you get a morale boost from causing mayhem, and lose morale from not doing it. Starting fires, killing, butchering, etc increase, not doing those things for a while subtracts.
Photographic memory - you remember what things look/what items are where when you canāt see them, but taking damage inflicts a morale penalty, which stacks under severe damage.
Sensitive - all morale effects are amplified 20-50%.
Sloppy penalty - eating/drinking wastes 10-20% of nourishment, all crafts take longer.
Hippie - eating fresh/less cooked foods provides morale boost, processed foods have a penalty
Marital art - Jarate - you apply a jar to self to fill it with urine. Throw to increase damage against enemies for 2-5 minutes in a 3x3 area.
Pooping for fertilizer, concentrating jarate for ammonia.
Living wood - combine zombie meat with wood stuff to make a material which repairs itself. Disgusting to craft/use, can be demolished to get meat chunks back for eating.
Thing - if you have a leash and a zombie corpse, you can revivify the hand to attack/distract nearby enemies.
Installing CBMs and mutagens into zombie corpses at a significantly higher base chance for success normal. Revived zombies have traits/use cbms.
Iāve always been partial to treants. Maybe if a portal is in the woods, it has a chance of converting a tree instead of spawning an enemy.
Mulberry trees, provide less wood but when foraged provide berries for jam.
Redwood trees. Provide 100x logs. Jungle forests which are dense, usually filled with animals and insects, and provides cover from rain.
Edit: Redwood trees have to be knocked down with explosives. Drops the logs in immediate surrounding, donāt be underneath.