Dragon, Shadow Mature Adult (CR 16)

Large Dragon
Alignment: Always chaotic evil
Initiative: +0; Senses: blindsense 60 ft., darkvision120 ft., low-light vision, and keen senses
Languages: Draconic

AC: 34 (-1 size, +25 natural), touch 9, flat-footed 34
Hit Dice: 22d12+88 (231 hp); DR: 10/magic
Fort +17, Ref +13, Will +18
Speed: 80 ft., fly 150 ft. (poor)
Space: 10 ft./10 ft.
Base Attack +22; Grapple +32
Attack: 1 bite +27, 2 claws +22, 2 wings +22, 1 tail slap +22
Damage: 1 bite 2d6+6, 2 claws 1d8+3, 2 wings 1d6, 1 tail slap 1d8
Special Attacks/Actions: Breath weapon 4(DC 26)
Abilities: Str 23, Dex 10, Con 19, Int 20, Wis 20, Cha 21
Special Qualities: Energy drain immunity, Shadow blend, Mirror Image, Dimension door, Frightful Presence DC26, SR 25
Feats: #Feats: 8
Skills: Skill points: 116
Advancement: 23-24 HD (Huge)
Climate/Terrain: Underground
Organization: Solitary (1 dragon, any age), clutch (1d4+1 wyrmlings, very young, young, juvenile, or young adults), family (pair of mature adults and 1d4+1 offspring)
Treasure/Possessions: Triple Standard

Source: Draconomicon

Breath Weapon (Su): A shadow dragons breath weapon is a cone of billowing, smoky shadows with an energy drain effect. Creatures within the cone gain 4 negative levels: the saving throw to remove the negative level is 26. A successful Reflex save (DC 26 reduces the number of negative levels by half (round down).

Shadow Blend (Su): During any conditions other than full daylight, a shadow dragon can disappear into the shadows, giving it nine-tenths concealment. Artificial illumination, even a light or continual flame spell, does not negate this ability. A daylight spell, however, will.