You assume the shape of any land or sea animal and gain greater benefits.
Prerequisite: Magic 8 ranks, Intermediate Gift, Transformation 1
Effect: On a successful Magic skill check (DC 25) you can assume the shape of any land or sea animal. This magical ability grants you access to the following special ability feats: Aerodynamic, Flight, Water Adaptation, Water Breathing, Size Decrease and Size Increase.
These feats are selected normally but are only usable by the character while she is transformed.
While in animal you cannot verbally communicate except through noises the animal form you have assumed could normally make, requiring a Speak Languages check (DC 20) to make yourself understood.
Special: If you fail the Magic skill check to transform, you suffer 2d6 points of non-lethal damage.
Once you assume a shape, you must make a successful Will saving throw (DC 18) to return to your human form. This saving throw can be retried once per hour.
You can transform into a winged creature.
Prerequisite: Magic 10 ranks, Intermediate Gift, Transformation 1, Transformation 2
Effect: You gain winged flight. The base speed of this flight is determined by your size as follows: Tiny or smaller (40 ft.), Small (20 ft.), Medium (10 ft.), Large or larger (5 ft.).
I don't know about it being "high fantasy" though- although if we're using a strict Howardian/Lovecraftian view of sword and sorcery magic, then yeah, just about anything big and flashy would be out of place.
But there is sword and sorcery with more magic than what we see in Conan (which- again- is pretty close to none), such as Lankhmar and Thieves World.
I'd say early thieves world (before it got totally crazy with gods running around and such) is a closer magical analogue than Conan.
The feat in question allows you to shapechange into a winged animal. Given that such effects were part of the fiction from the very beginning, it pretty much had to be there.