Changeling:
-Flight rank 1
-Shapeshifting rank 1
-Emotivore(Cannot benefit from normal food, except for potions/chems, nutrition gained from disposition of surrounding ponies (GM fiat), natural healing rate is based on the disposition of the nearest creature within 30ft towards you or your assumed form. ((Distance above Quarrelsome^2)*(CHA/3 RD) hp/hour). (Most party members will be friendly)
-No cutie mark
-Potency and versatality as unicorn.
-Strain equal to 15+1.5x(INT+END), as well as 0.5x(INT+END) per level. Strain recovery is based on emotions, as per HP recovery from emotivore. ((Distance above Quarrelsome^2) strain/hour)
-Starts with very limited spell access?
Changeling perks
-Flight (rank 1/2/3) (lvl -/4/12, AGI -/5/7): As pegasus
-Shapeshifting (rank 1/2) (lvl -/6, CHA -/4): At rank 1, you can assume the appearance of any pony you have seen in detail, as well as assume their voice. At rank 2, you may assume an original appearance of your own devising, with a voice to match.You may not use magic or fly unless you are in a form that can do so.
-Clothshifting (rank 1/2) (lvl 4/8, CHA 4/6): You may change the appearance of your clothes and barding when you shapeshift, although you get no bonuses (skills, DT, etc) from the false clothes, and you still take any penalties from weight. (maybe cannot change appearance of existing armour until level 2?)
-Viscous ichor (lvl 6): Once every (11-END) hours, you may regurgitate a glob of viscous slime and spit it at a foe. You make a survival check to hit, and if hit the target must make a AGL check, -1 for every 10 points you succeeded by. If they fail they are immobilized for 10 minutes(?).
-Corrosive ichor (lvl 6): Once every (11-END) hours, you may regurgitate a glob of corrosive slime and spit it at a foe. You make a survival check to hit, and if successful the target is splattered with acid and takes 10 damage per round until they take a 45 AP action to remove it. Armor only affects the overall damage taken from a single use, as it burns its way through.
-Healing ichor (lvl 6): Once every (11-END) hours, you may regurgitate a glob of recuperative slime and apply it to yourself or an ally. The ichor staunches wounds and speeds recurperation. This stops any bleed effects on the target and heals them for 10hp/turn for a number of turns equal to your medicine skill/10.
-Emotion sense (rank1/2/3)(lvl 4/4/4): You get +5 to speech and barter per level and can tell the basic emotional state of a living being just by being near them.