Mimic Armor

Some Mimics have been specially bred and trained to be used as armor. The armor is organic looking in nature, whatever armor it's supposed to replicate is shown with purple accents and occassionally teeth showing somewhere.
On a short rest you can change your armor type:
light armor: 12 + dex medium armor: 14 + dex (maximum of 2) heavy armor: 18
as a bonus action when grappled you can cause your mimic to make a bite attack dealing 1d6 acid damage.
you may also choose every long rest for your armor to take on similiar effects of either a bag of holding or a bag of devouring
bag of devouring adaptation: causes the grapple damage to increase to a number of d6s equal to half your proficiency bonus. bag of holding adaptation: you gain a 5 foot cubed space to fit anything that will appear right in your hand as a free action.