Fallaway

Your Dullahan capabilites have allowed you to detach not just your head, but your limbs from your body without grievous harm. As an action, you can detach up to two limbs from your body. These limbs can be away from your body up to a distance of 30 feet. While they are gone, any ability check made that would require a full set of limbs is made with disadvantage. You can also use a reaction to gain advantage on Dexterity saving throws. However, when you use this reaction, you are considered prone.