Staff of Power

A Staff of Power is a magical staff that grants beneficial properties to its wielder. Allura Vysoren wielded one during the Campaign of Vox Machina and later loaned that staff to Caleb Widogast. In the Age of Arcanum, Patia Por'co owned an Sphere of Power, in which she stored all the information she gained over the years, alongside many of her memories.

Description
Allura's Staff of Power is a tall ivory staff that has gold and silver symbols carved into it down the side, and a tightly wrapped faint blue and gold handle in the center. Strips of tethered material dangle from its intricate top and flow as it moves.

Patia's Sphere of Power is a golden orb that glows faintly and floats around Patia as if in orbit.

Properties
A Staff of Power can be wielded as a magic quarterstaff that grants a +2 bonus to attack and damage rolls made with it. While holding it, you gain a +2 bonus to Armor Class, saving throws, and spell attack rolls.

The staff has 20 charges for the following properties. The staff regains 2d8 + 4 expended charges daily at dawn. If you expend the last charge, roll a d20. On a 1, the staff retains its +2 bonus to attack and damage rolls but loses all other properties. On a 20, the staff regains 1d8 + 2 charges.

When you hit with a melee attack using the staff, you can expend one charge to deal an extra 1d6 force damage to the target.

While holding this staff, you can use an action to expend one or more of its charges to cast one of the following spells from it, using your spell save DC and spell attack bonus: Cone of Cold (5 charges), Fireball (5th-level version, 5 charges), Globe of Invulnerability (6 charges), Hold Monster (5 charges), Levitate (2 charges), Lightning Bolt (5th-level version, 5 charges), Magic Missile (1 charge), Ray of Enfeeblement (1 charge), or Wall of Force (5 charges).

You can use an action to break the staff over your knee or against a solid surface, performing a retributive strike. The staff is destroyed and releases its remaining magic in an explosion that expands to fill a 30-foot-radius sphere centered on it. You have a 50 percent chance to instantly travel to a random plane of existence, avoiding the explosion. If you fail to avoid the effect, you take force damage equal to 16 × the number of charges in the staff. Every other creature in the area must make a DC 17 Dexterity saving throw. On a failed save, a creature takes an amount of damage based on how far away it is from the point of origin, as shown in the following table. On a successful save, a creature takes half as much damage.

Exandria Unlimited: Calamity
Patia Por'co used her Sphere of Power as her arcane focus, and stored within it all of her collected knowledge, including stolen memories. She at one point used it to project the memories of a mage fought by the Ring of Brass so that the entire group could watch them. After dying for the first time in the Tree of Names' explosion, Patia realized that knowledge means nothing if there is nobody to make use of it, so she Teleported her Sphere of Power to Maya, knowing that it would be safe from the destruction in her hands.

Campaign 1 and Campaign 2
Allura carried her Staff of Power when she fought with Vox Machina in Campaign 1. She specifically used it to cast Magic Missiles against a flame skull when the group was approaching Raishan's lair.

When the Mighty Nein approached her asking for aid against the rising of the Somnovem and the threat of the Tombtakers and the Cognouza, Allura offered them her staff, saying, "This has been my staff for quite some time. I would very much like to have it back." Caleb then attuned to it, un-attuning to the Ioun Stone of Fortitude to do so.

Caleb used Allura's staff during the break-in at the Vergesson Sanatorium to cast Lightning Bolt and Fireball. It was also used to cast Wall of Fire using five charges, although it is unknown if this is an additional or a replacement spell to the list in the Dungeon Master's Guide. He used it again shortly afterward to cast Cone of Cold at a fire elemental, completely discharging it but succeeding on the roll to see if it retained its magical properties.

While the Mighty Nein were within the ruins of Aeor, Caleb used the staff to cast Levitate on Jester Lavorre so she could cast Symbol in a hidden, high location as a booby trap for the Tombtakers. In the ruins of the Praesidis ward, Caleb used the staff to cast Globe of Invulnerability to protect the party from an Aeorian trap. He similarly used it to protect the party by casting Wall of Force to block off a doorway, preventing two Aeorian absorbers and an otyugh from pursuing them.