Power of the Shambling Mound

You have developed traits similar to that of a shambling mound, granting you the following benefits:

• Increase your Strength or Constitution by 1, to a maximum of 20.
• You gain blindsight out to a range of 30 feet.
• When you are subjected to lightning damage, you can use your reaction to give yourself immunity to that instance of lightning damage. When you take this reaction you regain a number of hit points equal to either the lightning damage dealt or your level, whichever is lower. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.