Dragon, Song Juvenile (CR 10)

Medium Dragon (Electricity)
Alignment: Always either chaotic good or
Initiative: +0; Senses: blindsense 60 ft., darkvision120 ft., low-light vision, and keen senses
Languages: Tongues SA

AC: 23 (+13 natural), touch 10, flat-footed 23
Hit Dice: 14d12+28 (122 hp)
Fort +11, Ref +9, Will +13
Speed: 40 ft., fly 150 ft. (average)
Space: 5 ft./5 ft.
Base Attack +14; Grapple +16
Attack: 1 Bite +16, 2 claws +11, 2 wings +11 melee; Breath +16 ranged
Damage: 1 bite 1d8+2, 2 claws 1d6+1, 2 wings 1d4+1
Special Attacks/Actions: Breath Weapon 8d6 (19)
Abilities: Str 15, Dex 10, Con 15, Int 18, Wis 18, Cha 19
Special Qualities: Change shape, true seeing, tongues, light, darkness, feather fall, blink, electricity and poison immunity
Feats: #Feats: 5
Class Skills: Bluff, Disguise, Perform, and Skill points: 62
Advancement: 15-16 HD (Medium-size)
Climate/Terrain: Any land
Organization: Solitary or clutch (2-5)
Treasure/Possessions: Double Standard

Source: Monster Compendium: Monsters of Faerûn

Breath Weapon (Su): A song dragon has one breath weapon, a cone of electrically charged gas. Using a breath weapon is a standard action. Once a dragon breathes, it can't breathe again until 1d4 rounds later. A blast from a breath weapon always starts at the dragon's mouth and extends in a direction of the dragon's choice.

Alternate Form (Su): Song dragons can freely use an ability much like polymorph self to assume human form. They always appear as human females, and each song dragon has a unique human form that it assumes each time it changes shape. The song dragon's Strength, Dexterity, and Constitution scores become human average (Str 10, Dex 11, Con 10), but its hit points are unaffected by this change. A song dragon can employ its spells and special abilities - except its breath weapon - in either form.

Changing from dragon to human form requires 2 rounds; reversing the change takes only 1 round. During this time, the song dragon cannot move and can only use its spells or breath weapon; other actions and attacks are impossible. The change rends all known bonds, clothing, and other confinements, without harm to the song dragon.

True Seeing (Su): Song dragons have true seeing (as the spell) to a range of 15 feet. This ability is always active.

Tongues (Su): Song dragons can communicate in any language through the use of an innate tongues ability that is always active.