Taniniver

This legless, winged, white-eyed dragon is covered in patches of diseased flesh, squirming with maggots and oozing pus.
 

Taniniver (CR 18)

Huge Dragon
Alignment: Neutral Evil
Initiative: +4
Senses: Darkvision 120 feet, deathwatch; Perception +26
Aura: frightful presence (180 feet, DC 25)
  Speed: 30 feet, Fly 200 feet (clumsy)
Space: 15 feet
 

Defense

Armor Class: 33, touch 8, flat-footed 33 (+25 natural, -2 size)
Hit Points: 270 (20d12+140)
Saving Throws: Fort +21, Ref +12, Will +15
Negative Energy Affinity
Damage Reduction: 15/good and magic
Immunity: paralysis, sleep, visual effects
Energy Resistance: acid 30, cold 30, electricity 30, fire 30
Spell Resistance: 29
 

Offense

Melee: bite +30 (4d6+11 plus disease), 2 claws +30 (2d8+11 plus disease), tail slap +24 (2d8+5 plus disease)
Reach: 10 feet (15 feet with bite)
  Special Attacks: Breath Weapon (60-ft. cone, 1d6 Str drain plus mummy rot, Fortitude DC 27 negates, usable every 1d4 rounds)
  Spell-Like Abilities (CL 20th; Concentration +25):
  Spells Known (CL 7th; melee touch +22, ranged touch +15):

Statistics

StrDexConIntWisCha
33 (+11) 11 (+0) 25 (+7) 18 (+4) 17 (+3) 20 (+5)
Base Attack Bonus: +20
CMB +33
CMD 43 (can't be tripped)
  Feats: Cleave, Combat Reflexes, Critical Focus, Great Fortitude, Improved Initiative, Sickening Critical, Vital Strike, Weapon Focus (bite), Weapon Focus (claw)
  Skills: Bluff +28, Fly -12, Heal +26, Intimidate +28, Knowledge (arcana) +27, Knowledge (religion) +27, Perception +26, Sense Motive +26, Spellcraft +27, Stealth +15, Use Magic Device +28
  Languages: Common, Draconic, Undercommon
 

Special Abilities

Breath Weapon (Ex)

A taniniver's breath weapon is a hideous gray cloud of disease particles. Any creature in the area must succeed at a DC 27 Fortitude save or contract mummy rot (Pathfinder RPG Bestiary 210). The disease is contracted immediately (the onset period does not apply) and is an instantaneous effect. Ongoing saving throws against the disease use the dragon's breath weapon DC. The save DC is Constitution-based.

Disease (Ex)

A taniniver's natural attacks infect its opponent with a random disease from the following list: blinding sickness, bubonic plague, cackle fever, leprosy, mindfire, or shakes. The initial saving throw against these diseases uses the breath weapon's DC.
 

Ecology

Environment: Any Land or Underground
Organization: solitary
Treasure: standard

  Taninivers are a degenerate race of diseased dragons. A taniniver's body is alive but constantly rotting. Wracked by never-ending pain, with the stench of its own decaying flesh so strong it nearly overwhelms the vile creature's enhanced senses, the foul taniniver spends most of its time in magical research to reverse the progression of its diseases or, failing that, to stave off further deterioration.
  Taninivers often ally with cults of undeath or dragonkind.