Vampiric Mature Adult Red Dragon* (CR 20)

Huge Undead
Alignment: Always chaotic evil
Initiative: +3 (Dex); Senses: blindsense 60 ft., darkvision 120 ft., keen senses, Spot +35, and listen +40

AC: 37 (-2 size, +3 Dex, +26 natural), touch 11, flat-footed 34
Hit Dice: 25d12+100 (262 hp); DR: 10/magic
Fort +14, Ref +17, Will +16
Speed: 40 ft., fly 150 ft. (poor)
Space: 15 ft./10 ft. (15 ft. with bite)
Base Attack +25; Grapple +46
Attack: Bite +38 melee
Full Attack: Bite +36 melee and 2 claws +31 melee and 2 wings +31 melee and tail slap +31 melee
Damage: Bite 2d8+13, claws 2d6+6, wings 1d8+6, tail slap 2d6+19
Special Attacks/Actions: Blood drain, breath weapon, charm, create spawn, domination, energy drain, improved snatch, spells, spell-like abilities
Abilities: Str 37, Dex 16, Con -, Int 20, Wis 21, Cha 22
Special Qualities: fast healing 5, immunity to fire, keen senses, resistance to cold 20 and electricity 20, SR 23, turn resistance +4, undead traits, vampiric weaknesses
Feats: Alertness; Cleave; Combat Reflexes; Dodge; Flyby Attack; Hover; Improved Initiative; Improved Snatch; Lightning Reflexes; Multi'Snatch; Power Attack; Quicken Breath; Snatch; Wingover
Skills: Appraise +30, Bluff +19, Concentration +24, Diplomacy +24, Hide +3, Intimidate +32, Jump +38, Knowledge (arcana) +22, Knowledge (geography) +16, Knowledge (history) +16, Knowledge (nature) +13, Knowledge (religion) +16, Knowledge (the planes) +13, Move Silently +11, Search +38, Sense Motive +23, Spellcraft +30, Spot +35, and listen +40
Advancement: 26-27 HD (Huge)
Climate/Terrain: Warm mountains
Organization: Solitary or guarded (1 plus 2-5 vampire spawn)
Treasure/Possessions: Triple standard

Source: Draconomicon

Breath Weapon (Su): 50-ft. cone, 14d10 fire, Reflex DC 28 half.

Improved Snatch (Ex): Against Medium or smaller creatures, bite for 2d8+13/round or claw for 2d6+6/round.

Spell-Like Abilities: 7/day - locate object. Caster level 9th.

Spells: As 9th-level sorcerer.

Keen Senses (Ex): This vampiric red dragon sees four times as well as a human in low-light conditions and twice as well in normal light.

Sorcerer Spells Known (6/8/8/7/5; save DC 16 + spell level): 0 - arcane mark, dancing lights, detect magic, ghost sound, guidance, mage hand, read magic, resistance; 1st - alarm, magic missile, protection from good, shield, shocking grasp; 2nd -cat's grace, cure moderate wounds, darkness, sound burst; 3rd - dispel magic, protection from energy, stinking cloud; 4th - fire shield, greater invisibility.

This vampiric red dragon casts desecrate upon its lair each day, granting combat bonuses to it and its vampire spawn minions, if any. When it first senses intruders, it listens from a distance to learn more about them, sending vampire spawn forward to battle if available. If it can employ its charming voice before revealing its presence, it does so. In battle, it prefers to target lone opponents, using Flyby Attack and Snatch to grapple the target and then carry it to a safe location to employ its blood drain.

The DC is 28 for the Will save against this vampiric dragon's charm, domination, and frightful presence, and for the Fortitude save to regain levels lost to its energy drain.

This vampiric red dragon's natural weapons are treated as magic weapons for purpose of overcoming damage reduction.

This vampiric red dragon lurks in a dark cave deep beneath the earth, guarding its life-preserving hoard and awaiting new victims to add to its tally of death.