Soul of the treant

You become a treant over time gaining advantages and disadvantages, spells and abilities.

every level up you get 1d6 extra max hit points

your dexterity modifier is lovelered by 1 to a minimum of 0 and constitucion is increased by 1 

you may use your constitucion modifier for unarmed strike

expanded spell list: Awaken, barkskin, Ensnaring strike, Entangle, transport via plants, speak with plants, cure wounds, healing word, calm emotions, thorn whip, awakening screetch (homebrew).

you become resistance to: cold damage, blugeoning damage, piercing damage

you are vonurable to: fire damage, slicing damage

melody of natures soul

you gain all the benifits of this feature as long as you have levels invested in druid and have not multiclassed into artificer, sorcerer, wizard, warlock, rogue, cleric or paladin.

while being in one of your chosen terrain you regain 1d4 hit points per round

you may move through difiult terrain using 0 feet of movement (free movement)

you may use your reaction to ove to an ally within 15 feet and take all the damage he would take instead of him the folowing unarmed strike deals an extra amount of damage equal to the halve taken damage.

Druid architype: the gift of the treant soul

at level 2 you may choose 3 terrains Arctic/Coastal/Desert/Forest/Grassland/Hill/Mountain/Swamp/Underdark/Underwater/Urban your constitucion modifier increases by +1 when you are in that terrain (it does not give you extra hit points when leveling up)

you may use a wild shape to cast healing word this spellcasting ability is constitucion you may use this feature a number of times equal to your constitucion modifier.

your arms start to become roots and harden (your unarmed strike deals str.+con.+prof.)

after a long rest you may choose 1 spel in your prepared spell list that spells spellcasting ability becomes cnstitucion (at hygher levels you may choose more 2/3 3/6 4/10 5/14)

treant soul 1

you may choose 3 terrains forest/grassland/desert/coast/underdark/tundra/mountain your constitucion modifier increases by +1 when you are in that terrain (it does not give you extra hit points when leveling up)

you may use a wild shape to cast healing word this spellcasting ability is constitucion you may use this feature a number of times equal to your constitucion modifier.

your arms start to become roots and harden (your unarmed strike deals str.+con.+prof.)

after a long rest you may choose 1 spel in your prepared spell list that spells spellcasting ability becomes cnstitucion (at hygher levels you may choose more 2/3 3/6 4/10 5/14)

soul transmutation

at level 3 you may choose 1 of the 3 folowing traits (you can exchange one to another during a long rest):

Arm artilerie: your arm grows teeth that open to throw out a spore plant up to 20 feet away from you that can walk and explodes in spores after a short delay ( cr0 1d4 hit points movement of 15 feet after 3 rounds (or 18s) explodes dealing 2d4 poison damage) its turn is directly after yours (the damage increases to 2d6/6 2d8/14 and may deal acid damage instead of poison damage at 16lv).

twisted advance: your movement is folowed by deadly fumes that paralise anyone who you dont wish well. After you move 15 or more feet and walk next to an enemie he has to make a dexterity saving throw against your constitucion score or take 1d4-1 damage and be knocked prone he cant make an opertunity attack against you (you can use this feature con mod per short rest the damage increases to 1d6-1/6 1d8-1/14).

impenetrable bark: your bark hardens so that even a axe canot penetrate it. you can add your proficency to your ac while you are being attacked from 5 feet (range increases to 10/6 15/14 and you may double that proficency when you reach 16lv and when you are not beig attacked with slashing damage)

soul of inpenetrable vines

at level 6 add your proficency to your constitucion score.

once a short rest you may use your action and bonus action to regain 1d10+con mod+wis mod

at level 18 double the proficency added to your constitucion score

Soul of awakening

after reaching level 10 every time you use unarmed strike to deal damage to ann enemie you regain 1d4+con. mod.

you may use a wild shape to animate a plant within 45 feet if its a small plant use the awakened shrub stat block if its a medium plant use the awakened tree stat block (you can use this feature only equal to your constitucion modifiers per long rest) theyr turn comes directly after your turn and share a hyve mind with you and you can tell them a mental command them to do smt..

you may talk to animals and plants at will.

Soul of Natures guardian

at level 14 you gain these features:

Natures guardian: you are immun to deseases, get an +3 to your constitucion modifier i your choosen terrain, you may choose 2 additional terrain, in the choosen terrain during a short rest you awaken 1d4 awakened shrubs and during a long rest you awaken awakened shrubs equall to your constitucion modifier.

you may cast cure wounds instead of healing word with 15 feet range and may use constitucion modifier as your spellcasting ability for this spell.

you may block ranged attacks (as a reaction) taking halve the damage in a 5 feet radius (the original target gets 1/4 of the damage and this action cant be taken if the target is you).

you may devour a awakened shrub within 5 feet as a bonus action to gaining hit points equall shrubs health x2 +your constitucion modifier x2.

every round you get back hit points equall to halve of your constitucion Score while within 5 feet of a creature that has dealt damage to you.