Pint-Sized Slasher mask

The Pint-Sized Slasher Gear, which you will obtain during the tranquility lane quest, if you decide to help betty to kill all residents of Tranquility Lane, consists of a knife which has a lot more power than a normal knife, but the power is unknown, and higher critcal chance, and a clown mask. You do not keep these items, as they are taken off of you at the end of the quest.