Staff of the Iron Cauldron (Patreon)

Staff, very rare (requires attunement by a bard, cleric, sorcerer, warlock, or wizard)

This iron staff has a thorny cauldron mounted at its head, which belches a noxious fume from its mouth. Grass and similarly Tiny mundane plants wither when its twisted end is planted on them. This staff can be wielded as a magic quarterstaff that grants a +1 bonus to attack and damage rolls made with it, and it is always under the effects of the shillelagh spell.

The staff has 10 charges. While holding it, you can use an action to expend 1 or more of its charges to cast one of the following spells from it, using your spell save DC and spell attack bonus: acid arrow (2 charges), antilife shell (5 charges), blight (4 charges), grease (1 charge), poison spray (no charges, or 1 charge to cast at 5th level), or stinking cloud (3 charges).

The staff regains 1d6 + 4 expended charges daily at dusk. If you expend the last charge, roll a d20. On a 1, the staff explodes into smoke and all plant life within 500 feet flourishes.

Where he walks there treads decay

and death to feed his cauldron.

The dregs of life do heed his call

to drive the living away fro' him.

And while he hoards his rot away

and claims the leaves o' fallen,

he cannot stop, but merely stall

regrowth, rebirth: life's light undimmed.