You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

Your speed is 30 ft.

Your headless appearance is frightening to onlookers. You have proficiency in the Intimidation skill. 

You can detach and reattach your head at will. If you lack your own head, it can be replaced by an object resembling one such as a carved pumpkin or helmet. When you attach your head or object for the first time, it is considered "chosen". You can only have one chosen head at a time. You are considered Blinded if your chosen head is more than 30 feet from your body. 

When you take the Attack action on your turn, you can replace one of your attacks with an echoing shriek. Each creature of your choice within 10 feet of you must make a Wisdom saving throw (DC 8 plus your Constitution modifier and Proficiency Bonus). A creature that cannot hear is immune to this attack. On a failed save, a creature takes 1d10 psychic damage. On a successful save, a creature takes half as much damage. If one or more creatures fail the saving throw, you gain temporary hit points equal to your proficiency bonus. This damage increases by 1d10 when you reach character levels 5 (2d10), 11 (3d10), and 17 (4d10).

You can use this Wail a number of times equal to your Proficiency Bonus, and you regain all expended uses when you finish a Long Rest.

After reaching level 5, undead energy flows into your chosen head. Upon being reduced to 0 hit points, you can choose to have your head transform into a Death's Head, the Gnashing Head specifically. This transformation lasts 1 minute unless you are reduced to 0 hit points again, or an allied creature heals your body. You still make Death Saving Throws while in this form. Being reduced to 0 hit points in this form causes you to automatically fail one saving throw if you are not already stable. You can only use this transformation once per long rest.   

Your character knows at least three languages: Common plus two languages you roll or choose from the Standard Languages table. Knowledge of a language means your character can communicate in it, read it, and write it. Your class and other features might also give you languages.

The Standard Languages table lists languages that are widespread on D&D worlds. Every player character knows Common, which originated in the planar metropolis of Sigil, the hub of the multiverse. The other standard languages originated with the first members of the most prominent species in the worlds of D&D and have since spread widely.