5e: Blightrat

More than anything, I am a monster designer. Give me a terrifying looking image and I will hand you back a full stat block and description to terrify your players and their characters with. This is something I love doing. Having been caught up with so much lately, I haven’t had the time to create the monsters that I enjoy. So now I am taking a few moments out of my take and converting over a high level monster we created for Pathfinder and making it for 5e. We hope you have as much fun with this monster in your game as I had making it. Just a reminder, this hasn’t been edited by my editors so it is not at our published level of awesome yet (because JBE’s editors make everything even more awesome).

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Blightrat

Huge monstrosity, neutral evil
Armor Class 18 (natural armor)
Hit Points 189 (18d12 + 72)
Speed 50 ft., burrow 50 ft. climb 50 ft.
STR 18 (+4) DEX 17 (+3) CON 19 (+4)
INT 9 (–1) WIS 15 (+2) CHA 16 (+3)
Saving Throws Cha +8, Con +9
Skills Athletics +9, Perception +7
Damage Immunities acid, poison
Condition Immunities poisoned
Senses darkvision 60 ft., passive Perception 17
Languages understands Deep Speech but cannot speak
Challenge 15 (13,000 XP)

Actions

Multiattack. The blightrat makes three melee attacks: one bite and two claw.
Bite. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 17 (3d8 + 4) slashing damage. The target must succeed a DC 18 Constitution saving throw or become poisoned and take 21 (6d6) poison damage. The poisoned condition lasts until the disease is cured; clumps of hair fall out of the target until cured. Every 24 hours that elapses the target must repeat the saving throw, reducing its hit point maximum by 21 (4d6) on a failure. The disease is cured on a successful saving throw. The target died if the disease reduces its hit point maximum to 0. This reduction to the target’s hit point maximum last until the disease is cured.
Claw. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 22 (4d8 + 4) slashing damage.
Diseased Spit (Recharge 5–6). The blightrat unleashes a torrent of saliva and disease in a 30-foot line. Each creature in that line must make a DC 18 Dexterity saving throw, taking 27 (6d8) acid damage and 18 (4d8) poison damage on a failed save, or half as much damage on a successful one.
Even the drow know to stay away from a blightrat and the region where a full pox of these creatures nest. A blightrat is a nightmare for those that are prone to disease and value their hair, such as duergars and other dwarves, who think twice before facing a blightrat.
Highly aggressive and fiercely territorial, a blightrat will attack any creature that enters its territory unless the creature comes bearing tribute. Leaving a token of goodwill, such as moldy cheese or a mound of maggot-filled, spoiled meat about the size of a Medium creature, at the edge of the blightrat’s territory will often appease the creature. Blightrats also value gemstones and magic items, which they add to their hoards. Providing such gifts earns favor with a blightrat, paving the way for negotiations with it.
A blightrat stands 11 feet tall when on its hind legs and weighs about 3,000 pounds.