Blightbark Drakearmor. The bark forming the outer shell of the Drakearmor is petrified and hardened, and the thorny wood increases the shell's defense. Once taken down to 75 hit points, the armor breaks off, reducing the Drakearmor's AC by 4, but granting it more mobility and attacks.

Twisted Body While a creature is engulfed by the Drakearmor, it takes 2d6 bludgeoning damage at the start of each of its turns as they're constricted.

Innate Spellcasting. The Drakearmor's innate spellcasting ability is Charisma (spell save DC 16, +6 to hit with spell attacks). The drakearmor can innately cast the following spells, requiring no material components:

At will: message, detect thoughts

3/day each: major image, sending, ray of sickness

1/day each: erupting earth

Multiattack. The Drakearmor makes two attacks one with its bite and one with its slam, or two swipes if its blightbark shell is broken.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 13 (2d8 + 4) piercing damage and if the target is medium or smaller they are engulfed. While engulfed the  target is restrained (escape DC 15). If the shell moves the engulfed target moves with it. The Drakearmor can only have up to two medium or smaller creatures engulfed at a time.

Slam. Melee Weapon Attack: +7 to hit, reach 5ft., one target. Hit: 15 (2d10 + 4) bludgeoning damage.

Swipe (if Blightbark Shell is broken). Melee Weapon Attack: +7 to hit, reach 10ft., one target. Hit: 10 (2d8 + 4) bludgeoning damage. The target makes an Athletics or Acrobatics save (DC 15), and on a failure are knocked prone. A failure of 5 or more will knock the target back 15ft, inflicting another 1d8 bludgeoning damage should they be knocked into a wall.

Blightbark Splinter. Ranged Weapon Attack: +7 to hit, reach 30ft., one target. Hit: 11 (2d6 + 4) piercing damage.

Blightvine Sinew (if Blightbark Shell is broken). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) piercing damage and if the target is medium or smaller they are engulfed. While engulfed the  target is restrained (escape DC 15). If the shell moves the engulfed target moves with it. The Drakearmor can only have up to two medium or smaller creatures engulfed at a time.

The Gulthian Drakearmor can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The Gulthian Drakearmor regains spent legendary actions at the start of its turn.

Blightbark Armor (Costs 1 Action). The Drakearmor may make an additional Blightbark Splinter reaction.

Blightbranch Tail (Costs 1 Action). Melee Weapon Attack: +7 to hit, reach 5ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage. The target makes an Athletics or Acrobatics save (DC 15), and on a failure is knocked prone. A failure of 5 or more will knock the target back 15ft, inflicting another 1d8 bludgeoning damage should they be knocked into a wall.

Vine Hunter (Costs 2 Actions, Blightbark Shell must be broken). The Drakearmor may immediately make a movement up to its full Burrow speed without incurring opportunity attacks. Any targets in the path of the burrowing Drakearmor must make an Athletics or Acrobatics save (DC 15) or be knocked prone.