13th child of a 13th child

you were born 13th from your 13th child mother or father. in Scotland they believe that this grants special shape shifting powers. you remember the many times in your young days you attempted to shape shift but failed, eventually you managed to shape shift into a rat, which marked the start of your extraordinary career. 

Ability Scores: Dexterity, Charisma or Wisdom.

Feat: you gain either the Defense feat or the magic initiate feat (cleric or warlock) and you also know the polymorph spell with 10 spell slots per long rest, and charisma or wisdom for the spellcasting ability.

Skill Proficiencies: Choose 2: Deception, Intimidation, Sleight of hand, Animal handling, Survival, Nature, or Insight.

Tool Proficiencies: Herbalism kit or Pan flute

Languages: language of the animals, plus one, and common plus race language.