Worm Of Gluttony

Worm of Gluttony The Abyss is home to all sorts of depraved horrors. Among its infinite layers, one finds the homes to countless demons, each domain worse than the next. Perhaps no domain is worse than layer 1,000, Rorglum.
At first, Rorglum doesn’t seem that sinister. The layer resembles a massive dirt pit, devoid of life of any kind. There is no weather in Rorglum, just a blank, black sky above, absent of stars and other planetary bodies.
Keen observers will soon realize the true horror of Rorglum. The reason there is nothing in Rorglum is that its single inhabitant is responsible for eating everything there: the Worm of Gluttony.
The Worm of Gluttony is roughly the size of a dog. It glistens with reddish pus, potentially a byproduct of the lives it has devoured. It lacks eyes. All it possesses is a small, puckered sphincter of a mouth.
The Worm is surprisingly slow, inching its way across the barren landscape towards its prey. But since Rorglum lacks any place to hide or method of gaining sustenance, all the worm has to do is wait for its target to exhaust itself.
From there, the Worm crawls into one of its quarry’s orifices, pulling itself into the creature’s stomach or gullet. Then, it expands its form, placing its mouth within the mouth of the creature it possesses. As a host, the creature develops the same insatiable hunger of the Worm, eating anything in sight. However, the Worm imbues the host with extraordinary resilience, making its host nearly indestructible–so long as the host continues to feed itself, that is.
Immortal. Some believe that as long as gluttony exists in the multiverse, the Worm of Gluttony cannot be destroyed. However, if a solar should sacrifice itself in the presence of the worm, it can use its dying wish to destroy the worm. Unfortunately, as long as gluttony exists in the multiverse, the worm rejuvenates 1d10 x 10 years later. If all gluttony in the multiverse is wiped out, the worm withers into nothing, leaving nothing but a thin, crumbling shell.
Worm of Gluttony Medium fiend (demon), chaotic evil
Armor Class 7
Hit Points 7 (2d8)
Speed 15 ft.
Abilities Str 9 (-1), Dex 5 (-3), Con 10 (+0), Int 7 (-2), Wis 12 (+1), Cha 5 (-3)
Damage Resistances cold, fire, lightning; bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities poison
Condition Immunities blinded, deafened, exhaustion, poisoned
Senses blindsight 30 ft., passive Perception 11
Languages –
Challenge 0 (10 XP)
Regeneration. The worm regains 1 hit point at the start of each of its turn even if its hit points are reduced to 0.
Magic Resistance. The worm has advantage on saving throws against spells and magical effects.
Actions Bite. Melee Weapon Attack: +1 to hit, reach 5 ft., one creature. Hit: 1 (1d4 – 1) piercing damage and the worm attaches itself to the target. The worm can detach itself by spending 5 feet of its movement. A creature, including the target, can use its action to detach the worm.
Invade. The worm attempts to pull itself into the body of a humanoid it is attached to. The target must make a DC 10 Constitution saving throw. On a failed save, the worm enters the creature’s body through the nearest available orifice. The worm then disappears, and the target becomes host to the worm.
In 1d4 hours after the worm enters the host, the host undergoes a metamorphosis, and gains the following traits:
Similar to the flesh of a worm, the host’s skin takes on a rubbery, slimy texture, and it sweats its own blood. It has disadvantage on Charisma checks. The host’s eyes shrivel back into its skull and its ears wilt away. However, it gains blindsight out to 30 feet and is immune to the blinded and deafened condition. The host gains the regeneration trait. It regains 1d10 hit points every 10 minutes. If the host loses a body part, the missing body part regrows and returns to full functionality after 1d4 + 1 days. Not even reducing the host to 0 hit points ends this effect. The host has advantage on saving throws against spells and magical effects. The host gains resistances to cold, fire, and lightning damage, as well as damage from bludgeoning, piercing, and slashing from nonmagical weapons. The host gains immunity to poison and the poisoned condition. Unless it already has one, the host gains a natural bite attack which it can use to make unarmed strikes. On a successful hit, the host deals piercing damage equal to 1d4 plus its Strength modifier. The host is wracked with an insatiable hunger. Each hour that the host does not consume at least half its body weight in food–which can be anything, including things that would normally be inedible–its hit point maximum is reduced by 1. If this reduction would reduce the host’s hit points to 0, the host dies, dissolving into a pile of rancid ichor from which the worm reappears. The host can sate its hunger for a period of time if it eats a magical item. The time its hunger is sated depends on the rarity of the magic item: 10 minutes for common magic items, 1 hour for uncommon magic items, 8 hours for rare magic items, 24 hours for very rare magic items, and 1 week for legendary magic items. It cannot eat artifacts. While the worm is inside the host, it can only be removed with a greater restoration spell or similar magic that would remove a disease. Once removed, the worm reappears in an unoccupied space within 5 feet of the host. The host then returns to normal.