Contortionist

Serious practice and/or natural talent has gifted you with the ability to squeeze, shape, and extend your body in ways most would consider unnatural. You gain the following benefits:

• You are not considered to be squeezing while in a space one size smaller than your size.
• You can freely move through a hostile creature's space if the creature is at least one size larger or smaller than you, and other creatures' space does not normally count as difficult terrain for you.
• You gain advantage on Dexterity (Acrobatics) checks made when avoiding or escaping from being grappled and when taking the Tumble action.
• When you are forced to make a Dexterity saving throw, you may use your reaction to give yourself advantage on the saving throw. Once you use this ability, you cannot use it again until you complete a short or long rest.