Anima Elemental

Aura of Life. Creatures of the Anima Elemental's choice within 30ft of it can regain 10 hit points at the start of each of its turns. The Anima Elemental only emits this aura while it isn't Incapacitated. 

False Appearance. While motionless, the Anima Elemental is indistinguishable from a large plant. A successful DC 18 Intelligence(Investigation) check is needed to discern that the elemental is animate. 

Forest Treader. The Anima Elemental can move through nonmagical difficult terrain created by nonmagical plants without using any extra movement speed. 

Photosynthesis. At the start of each of its turns, the Anima Elemental regains 10 hit points. If it starts its turn in sunlight, it regains 20 hit points instead. 

Spider Climb. The Anima Elemental can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. 

Sun Absorption. Whenever the Anima Elemental takes radiant damage, it takes no damage and instead regains hit points to the amount of radiant damage dealt. 

Multiattack: The Anima Elemental makes two Anima Vine attacks. It can substitute any one of these attacks for an Anima Bolt attack.

Anima Vine: Melee weapon attack, +6 to hit, reach 10ft, one target. Hit 17(4d6+3) bludgeoning damage. Upon a hit, the target is grappled and Restrained(escape DC 15).

Anima Bolt: Ranged spell attack, +6 to hit, range 120ft, one target. Hit 12(2d8+3) poison damage. If this attack is made in sunlight, it deals an additional 9(2d8) radiant damage.

Anima Beam(Recharge 5-6): The Anima Elemental fires a beam of light in a 60ft line that is 5ft wide. Each creature in that line must make a DC 16 Dexterity saving throw, taking 13(3d8) poison damage plus 13(3d8) radiant damage on a failed save, and half as much on a successful one. 

If the Anima Elemental uses this attack in sunlight, it deals an additional 22(5d8) poison damage plus 22(5d8) radiant damage. 

Plant Stride. As a bonus action, the Anima Elemental can enter a huge or larger plant and emerge 5ft from another huge or larger plant within 60ft of its original location.

Tree Stride. If the Anima Elemental is within 5ft of a huge or smaller plant, it can use its reaction to merge into that plant whenever it is targeted by an attack or saving throw. This reaction occurs before the triggering effect and grants the Anima Elemental total cover as it takes no damage. This effect only applies to the trigger attack or effect.