Dragon, Obsidian Very Young (CR 4)
AC: 19 (+9 natural), touch 10, flat-footed 19
Hit Dice: 10d12+20 (85 hp)
Fort +9, Ref +7, Will +6
Speed: 40 ft., fly 150 ft. (poor), burrow 20 ft., swim 20 ft.
Space: 5 ft./5 ft.
Base Attack +10; Grapple +12
Attack: 1 bite +12, 2 claws +7, 2 wings +7
Damage: 1 bite 1d8+2, 2 claws 1d6+1, 2 wings 1d4
Special Attacks/Actions: Breath weapon 4d10 (17)
Abilities: Str 15, Dex 10, Con 15, Int 17, Wis 9, Cha 8
Special Qualities: Fire subtype, planar travel, SR -, Fear aura (DC -)
Feats: #Feats: 4
Skills: Skill points: 36
Advancement: 11-12 HD (Medium-size)
Climate/Terrain: Inner Planes, warm mountains, 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: Double standard
Fire Subtype (Ex): An obsidian dragon is immune to fire but takes double damage from cold, except on a successful save.
Breath Weapon (Su): An obsidian dragon has one breath weapon: a cone of fire.
Planar Travel (Su): Obsidian dragons have the innate ability to pass instantly between the Material Plane and the Inner Planes, where they often make their homes.
Psionics (Sp): 3/day -- biofeedback, burning ray, ectoplasmic armor, firefall, flaming shroud, plane shift, wall of ectoplasm, whitefire; 1/day -- genesis, mind store. Manifester level varies by age; save DC d20 + appropriate ability modifier + power level.
Attack/Defense Modes: mind thrust/thought shield. An obsidian dragon manifests powers and gains additional attack and defense modes as if it were a psion with Metacreativity as its primary discipline.
Skills: An obsidian dragon has the Appraise skill for free at 1 rank per Hit Die.
A creature with the fire subtype has immunity to fire. It has vulnerability to cold, which means it takes half again as much (+50%) damage as normal from cold, regardless of whether a saving throw is allowed, or if the save is a success or failure.