Flail of the Elder Deacon

Weapon (flail), uncommon (requires attunement)
  This solid steel incense dispenser dangles at the end of a black metal chain. The heady perfume of incense and myrrh follow in the wake of the bearer of this weighty, magical weapon.
  You have a +1 bonus to attack and damage rolls made with this magic weapon, which has 3 charges. To recharge the flail, you must perform a one-hour ritual between dawn and dusk, consuming quality incense with a value in gold pieces equal to five times the number of charges you wish to regain.
  As an action you can cast the following spells (save DC 13), expending at least the number of charges indicated and requiring no material components. For each additional charge expended above the number indicated, the slot level of the cast spell increases by one.
  • Fog cloud - 1 charge
  • Misty step - 2 charges
  • Stinking cloud - 3 charges
  Rare variant: Increase the bonus to +2 number of charges to 5 and add ‘Cloudkill - 5 charges’ to the list of spells.