Assassin's Oni Mask

A Red terrifying mask with onyx horns and fangs. While wearing this mask the owner can cast invisibility on themself only 4 times between long rests.

1. At the end of a long rest you must roll (1d4) to see how many of the charges you can get back.
2. Fallowing the rules of invisibility as soon as you attack someone the invisibility drops. If it is a melee attack the victim must make a constitution saving throw (DC 15) on failure the target is frightened of you.
3. Also you have advantage on intimitation
4. Also while wearing the mask you can read, write, and speak Infernal
5. As well have resistance to fire damage   

Notes: Resistance: Fire, Language: Infernal, Advantage: Intimidation, Frightened, BOOP, Can only be attuned to a Thief , Headwear