Dragon, Shadow Young Adult (CR 11)

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

AC: 29 (+19 natural), touch 10, flat-footed 29
Hit Dice: 16d12+32 (136 hp); DR: 5/magic
Fort +12, Ref +10, Will +14
Speed: 80 ft., fly 150 ft. (poor)
Space: 10 ft./10 ft.
Base Attack +16; Grapple +19
Attack: 1 bite +19, 2 claws +14, 2 wings +14, 1 tail slap +14
Damage: 1 bite 2d6+3, 2 claws 1d8+1, 2 wings 1d6, 1 tail slap 1d8
Special Attacks/Actions: Breath weapon 2(DC 22)
Abilities: Str 17, Dex 10, Con 15, Int 18, Wis 18, Cha 19
Special Qualities: Energy drain immunity, Shadow blend, Mirror Image, Frightful Presence DC22, SR 20
Feats: #Feats: 6
Skills: Skill points: 70
Advancement: 17-18 HD (Large)
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 2 negative levels: the saving throw to remove the negative level is 22. A successful Reflex save (DC 22) 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.