While you hold this magical staff, you have resistance to cold damage, fire damage, and poison damage, and you gain a +2 bonus to the damage rolls of spells you cast that deal fire damage.

The staff has 50 charges for the following properties. It regains 4d6 + 2 expended charges daily at dawn. If you expend the last charge, roll a 20. On a 20, the staff regains 1d12 + 1 charges.

Magma Bolt. While holding the staff, you can use an action to expend up to 5 charges to blast one target that you can see within 60 feet. You make a ranged spell attack against the target using your spellcasting ability.

On a hit, the target takes 6d6 fire damage plus 2d6 additional fire damage for each charge expended, and it must succeed on a DC 20 Dexterity saving throw or become restrained by the hardening rock. A creature can make a DC 15 Strength (Athletics) check as an action, freeing itself or a creature within reach from the rock on a success. The rock has AC 17 and hit points equal to 5 + the number of charges expended, and it is immune to fire, poison, and psychic damage.

Spells. While holding the staff, you can use an action to expend some of its charges to cast one of the following spells from it, using your spell save DC and spell-casting ability: caldera (new) (magma version only, 16 charges), erupting earth* (3 charges), fireball (9th-level version, 7 charges), fire shield (4 charges), incendiary cloud (8 charges), molten upheaval (new) (5 charges), move earth (6 charges), pyrokinesis (new) (1 charge), stinking cloud (3 charges), wall of lava (new) (10 charges), or wall of fire (4 charges).

You can also use an action to cast one of the following spells from the staff without using any charges: burning hands (3rd-level version), control flames,* fire bolt, fog cloud, heat metal, mold earth,* or pyrotechnics.*

Volcanic Transformation. You can use an action to plant the staff into the ground in your space when you are not indoors and dissolve it into magma. This can be done underground. The magma shoots into the ground and deep into the earth, and the staff is destroyed.

Over the next 50 days and 1 hour, a small volcano grows from the ground in that location with a radius of 1 mile at its base, as if the new caldera spell had been used repeatedly at that location. The time it takes the volcano to appear is reduced by one day for each charge in the staff. If this 9th-level spell effect is dispelled before the volcano finishes appearing, the ground returns to its original state.

Notes: Resistance: Cold, Resistance: Fire, Resistance: Poison, Damage: Fire, Druid, Sorcerer, Warlock, or Wizard, Buff, Exploration, Combat, Warding