A concept for a Race, a weakened version of the Lycanthrope, could be regarded as a variant on the Eberron race the Shifter. The Therianthrope or Therian for short could be regarded as half Lycanthrope or some cousin in the setting.
The Therians are Medium sized creatures, speed 30 feet, low light vision, keen senses, +2 to one ability score (same as the human, half elf and half elf) and scent.
It has the racial ability known as hybrid. Using a similar system as the Alchemist Mutagen special ability however with some limitations, the Therian can assume an anthropomorphic hybrid form as a move action.
First option the player chooses either to have +2 Strength and -2 Intelligence, +2 Dexterity and -2 Wisdom or +2 Constitution and -2 Charisma while in hybrid form.
Second option the player chooses one physical ability to gain +2 and one mental ability to lose for a bit more freedom.
Either option this becomes set after character creation.
Finally the Therian has a natural attack while in hybrid form
Here are some feat option ideas for this race
Swift Hybrid: Assume hybrid as a free action
Improved Hybrid: Improve +2 to +4 hybrid physical bonus
Greater Hybrid: Requirement Improved Beast - Improve +4 to +6 hybrid physical bonus
Extra Hybrid: Gain an extra new hybrid option.
Extra Natural Attack: Gain an extra natural attack - bite, gore, tail, etc.
Feedback on this concept would be appreciated