The merger of faeybrin and beast essence.
A latent Merovin spark has only 2 forms: Full Humanoid and Full Animal.
Requires an Action > 3 rounds of Restrained Condition. Failure = reverts to form began in. Success = changes to the alternate form and Shifted Healing ( Proficiency Bonus in damage at the end; A character cannot gain more until more damage is taken after the last Shifted Healing).
DC 10
DC 15