Empathic Shifter

Empathic Shifters, also known as Empath Metamorphs, are Supernaturals whose power of shapeshifting is tied to their emotions. That is, they can shapeshift into various forms but only in relation to a particular emotion they are experiencing at that given time. 
The shifting can occur automatically, as soon as the emotion is felt, which would leave the Shifter with little control over themselves (this tends to be the case with younger Empath Shifters, older ones have learned to control when they give into their emotions). 
Shifters can assume the form of animals psychologically related to what they are feeling, monsters, or inanimate objects. Abstract or mutant forms are generally out of bounds for all but the most experienced Shifters.