Treekin (5e Creature)

Large plant, chaotic good

Armor Class 16 (barkskin)
Hit Points 93 (11d10 + 33)
Speed 30 ft.

Saving Throws Con +5, Wis +4
Skills Nature +4, Perception +5
Damage Vulnerabilities fire
Damage Resistances bludgeoning, piercing
Condition Immunities frightened
Senses passive Perception 15
Languages understands Druidic, Elvish and Sylvan but can't speak
Challenge 4 (1,100 XP)

Brute. A melee weapon deals one extra die of its damage when the treekin hits with it (included in the attack).

False Appearance. While the treekin remains motionless, it is indistinguishable from a normal tree.

Nature Guardian. The treekin is always under the effect of the barkskin and pass without trace spells.

The strongest of spirits gather the plants around them and are reborn as bulky wooden creatures called treekin.
At the heart of every treekin resides the soul of a dead wood elf warrior, though this is not the fate of all. Only the strongest and most heroic souls retain enough individuality to become such creatures. Most, eager to renounce the identity and struggles that shaped their mortal lives, pass into the Weave of the forest. Though their family and friends might occasionally fancy that they can hear their loved one's voice upon the wind, it is but an echo of a life long abandoned. However, those souls that become treekin are unable to completely abandon their grip on their former lives, and they forge themselves a new body out of dead timber so that they might continue to defend in death that which they loved in life.