Half-Dragon (Black)/Human* (CR 6)

Medium Dragon (Augmented Humanoid)
Alignment: Often chaotic evil
Initiative: +1 (Dex); Senses: darkvision 60 ft., low-light vision, Listen +3, and Spot +_4
Languages: Draconic, Common

AC: 24 (+1 Dex, +4 natural, +9 +1 full plate armor), touch 11, flat-footed 23
Hit Dice: 4d10+16 (43 hp)
Fort +8, Ref +2, Will +4
Speed: 30 ft. (20 ft. full plate armor)
Space: 5 ft./5 ft.
Base Attack +4; Grapple +10
Attack: Masterwork two-bladed sword +12 melee or javelin +5 ranged
Full Attack: Masterwork two-bladed sword +10 melee/ +10 melee and bite +5 melee or javelin +5 ranged
Damage: Masterword two-bladed sword 1d8+11/19-20 or 1d8+8/19-20 and 1d8+5/19-20, bite 1d6+3, javelin 1d6+6
Special Attacks/Actions: Breath weapon
Abilities: Str 22, Dex 13, Con 18, Int 10, Wis 12, Cha 12
Special Qualities: 4th lvl Fighter, immunity to acid, sleep and paralysis
Feats: Exotic Weapon Proficiency (two-bladed sword); Iron Will; Power Attack; Two-Weapon Fighting; Weapon Focus (two-bladed sword); Weapon Specialization (two-bladed sword)
Skills: Climb +5, Intimidate +4, Jump -1, Listen +3, and Spot +_4
Advancement: By character class
Climate/Terrain: Temperate plains
Organization: Solitary
Treasure/Possessions: Standard

Source: Monster Manual

Breath Weapon (SU): 30-foot line, once per day, damage 6d8 acid. Reflex DC 14 half. The save DC is Constitution based.

Possessions: +1 full plate armor, masterwork two-bladed sword, 2 javelins

Augmented Subtype

A creature receives this subtype whenever something happens to change its original type. Some creatures (those with an inherited template) are born with this subtype; others acquire it when they take on an acquired template. The augmented subtype is always paired with the creature's original type. For example, a wizard's raven familiar is a magical beast (augmented animal). A creature with the augmented subtype usually has the traits of its current type, but the features of its original type. For example, a wizard's raven familiar has an animal's features and the traits of a magical beast.