Serious Version
If I were a boss I would be some kind of living Gargoyle thing so:
Stone Wings of Evil: Can be equipped on the player in the cape/cloak slot. (Battle Trophy). DOES NOT GRANT FLIGHT
Stone Horns of Evil: Can be equipped as headgear. +9 to melee damage, 20% reflect damage, and -10 to personality
Crystal of the Gargoyle Curse: When used transforms the player into me until used again. When used again they turn back. Infinite uses. When turned into me town guards will attack the player on sight
Funny Version
Wallet of Devouring: Consumes all money that the player is carrying and any money they get is also consumed. Can't be dropped, sold, or traded
Ultimate Evil Box: An orphanage explodes every 5 seconds this item is carried. Also can't be dropped, traded, or sold
Armor of Internetus: If equipped grants a bonus of over 9000 to all stats except personality, -8000000000000 to personality, gives some new spells.
Spells given: LAZOR: 99999999 Pure Damage with splash
Charge LAZOR: doubles the damage and splash of next LAZOR
Spam: 1 damage each hit but hits 45670145 times