Gnomish and Common

Your new un-life comes with many new abilities, You can choose two skills and raise them both by 1

Once a day you could choose one of these abilities and use it (recharges after dawn):

*You can pass through any solid wall that is not magically warded, for every 6 inches you take 1d4 piercing damage.

*You screech, any enemy that can hear you must make a DC13 Wis saving throw or be frightened of you for 2 rounds. 

*You turn completely invisible and automatically succeed on any stealth checks for 3 minutes.  

You deal 1d4 cold damage plus STR on an unarmed strike.

As a ghost you have the ability to fly, you gain a fly speed equal to half your land speed, rounded up to the nearest 5 feet. This motion requires effort, during combat it will take up a full action.

Due to your unnatural life, your new form has many unique strengths and weaknesses. You are resistant to cold and necrotic damage and immune to poison. You are also Vulnerable to radiant damage. 

You have disadvantage on sight based checks (Perception, Investigation, etc. to DMs discretion) when exposed to sunlight.