Clocktower Reward
You get exotic gloves with selectable stats and a superior rune of the mad king. Then you get 2 tonics: 1 sceleton and 1 ghost. Trick-or-treat bags also if I remember correctly
Also if you do it again, even on another character, you just get trick-or-treat bags.
Unlike last year where each character gets a piece of armour for completing the JP,you get a accounbound chest with the gauntlets in it for a 1 character only use only and 2 tonics