The Liber Influxus Communis is slowly finalized. In fact the WIP version of pdf is already available (at least for backers and contributors, but I think that those who aren't either can get it as well). In light of this it's time to present a sample NPC that uses the class I wrote: the metamorph.
A muscular half-orc with a pair of draconic wings, clawed hands, elongated jaws revealing terrible fangs, and a tail ending with a vicious stinger. His skin is covered in patches of black scales completing the quasi-draconic image.
CR 8; XP 4,800
Male half-orc metamorph 9
NE Medium humanoid (human, orc)
Init +6; Senses darkvision 60-ft,, Perception +19
AC 25, touch 19, flat-footed 18 (+2 armor, +2 Dex, +2 deflection, +5 dodge, +4 natural)
hp 76 (9d8+36)
Fort +10, Ref +10, Will +12
Speed 30 ft., fly 30 ft (average)
Melee bite +13 (1d6+7), 2 claws +13 (1d4+7), sting +13 (1d4+7)
Special Attacks breath weapon (30-ft. cone, 9d6 acid, DC 19)
Str 20, Dex 14, Con 14, Int 10, Wis 20, Cha 8
Base Atk +6; CMB +11; CMD 28
Feats Extra Vital Surge (x3), Flyby Attack, Improved Initiative, Iron Will, Toughness
Skills Acrobatics +6, Climb +9, Fly +8, Knowledge [arcana] +12, Linguistics +3, Perception +17, Survival +17, Swim +9
Evolutions bite, breath weapon (acid), claws, energy immunity (acid), flight (winged), improved natural armor, sting, tail
Languages Common, Draconic, Dwarven, Giant, Orc
SQ enhanced natural attacks, vitality surge (4d6, 15/day)
Combat Gear belt of physical might (Str, Dex) +2, bracers of armor +2, cloak of resistance +2, headband of inspired wisdom +4, ring of protection +2.
Breath Weapon (Su): Dragonheart can spew a spray of acid dealing 9d6 points of damage in a 30-ft. long cone, or half on a successful Reflex saving throw against DC 19. Using this ability expends one use of vitality surge.
Enhanced Natural Attacks (Su): Dragonheart's natural attacks have +2 enhancement bonus to attack rolls and damage.
Vitality Surge (Ex): Up to fifteen times per day, Dragonheart can tap reserves of his vitality as a swift action healing 4d6 points of damage.
Born under another name, name torn to pieces and thrown to the wind, Dragonheart was an outcast, a half-breed hated and mocked by his orcish kinfolk. His life was destined to be short and miserable, serving as a slave to his kin for weakness of his blood. This all changed when the tribe unwittingly stirred local pack of wyverns starting a prolonged war of attrition between orcs and the serpentine fliers. While the orc warriors hunted and prepared ambushes, Dragonheart deep inside wished them failure. When warriors were back with their dead comrades, Dragonheart secretly cheered the scaled menace, when warriors came back with trophies taken from a slain wyverns, Dragonheart was mourning the beasts, and yet hated them for their failure. When away from the tribe, he cursed the tribe for not dying, and he cursed the wyverns for not killing more of the orcs...
One night, he was selected to be a servant to the hunting party, though, and that changed everything. Their ambush on a pair of wyverns was total failure, for Dragonheart let the pebbles fall and alert the wyverns to the hunters' presence. Without the advantage of surprise the orcs rushed the beasts and fell, one by one. They managed to kill one and cripple the other, but in the end only one out of dozen hunters stood, preparing to kill the incapacitated beast. Dragonheart stabbed him in the back and then silently whispered his reasons in the ear of dying kinfolk. After severing final ties connecting him to his tribe, Dragonheart came to the crippled wyvern, killed it with the same knife, cut out the heart and ate it. He woke next morning changed, with claws and first scales on his body. It was the beginning of the transformation that was slowly moving him from mocked half-breed into monstrous hybrid. His scales grew stronger, he sprouted pair of wings. Later, much stronger Dragonheart managed to kill a young black dragon, again eating the heart of the magnificent prey and gaining more of its strength—affinity for corrosive acid that the beast spewed. He was no longer member of vanquished tribe. He was Dragonheart.