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

This staff 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.
Power Strike. When you hit with a melee attack using the staff, you can expend 1 charge to deal an extra 1d6 force damage to the target.
Spells. While holding this staff, 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: 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).
Retributive Strike. 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.

Staff, very rare (requires attunement)

This staff can be wielded as a magic quarterstaff that grants a +3 bonus to attack and damage rolls made with it.

The staff has 10 charges. When you hit with a melee attack using it, you can expend up to 3 of its charges. For each charge you expend, the target takes an extra 1d6 force damage. The staff regains 1d6 + 4 expended charges daily at dawn. If you expend the last charge, roll a d20. On a 1, the staff becomes a nonmagical quarterstaff.

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

This staff has 10 charges and regains 1d6 + 4 expended charges daily at dawn. If you expend the last charge, roll a d20. On a 1, a swarm of insects consumes and destroys the staff, then disperses.
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: giant insect (4 charges) or insect plague (5 charges).
Insect Cloud. While holding the staff, you can use an action and expend 1 charge to cause a swarm of harmless flying insects to spread out in a 30-foot radius from you. The insects remain for 10 minutes, making the area heavily obscured for creatures other than you. The swarm moves with you, remaining centered on you. A wind of at least 10 miles per hour disperses the swarm and ends the effect.

Scroll, varies

A spell scroll bears the words of a single spell, written in a mystical cipher. If the spell is on your class’s spell list, you can use an action to read the scroll and cast its spell without having to provide any of the spell’s components. Otherwise, the scroll is unintelligible.

If the spell is on your class’s spell list but of a higher level than you can normally cast, you must make an ability check using your spellcasting ability to determine whether you cast it successfully. The DC equals 10 + the spell’s level. On a failed check, the spell disappears from the scroll with no other effect. Once the spell is cast, the words on the scroll fade, and the scroll itself crumbles to dust.

The level of the spell on the scroll determines the spell’s saving throw DC and attack bonus, as well as the scroll’s rarity, as shown in the Spell Scroll table.
Spell Scroll (table)

A wizard spell on a spell scroll can be copied just as spells in spellbooks can be copied. When a spell is copied from a the copier must succeed on an Intelligence (Arcana) check with a DC equal to 10 + the spell’s level. If the check succeeds, the spell is successfully copied. Whether the check succeeds or fails, the spell scroll is destroyed.

Wondrous item, legendary

This 2-foot-diameter black sphere is a hole in the multiverse, hovering in space and stabilized by a magical field surrounding it.

The sphere obliterates all matter it passes through and all matter that passes through it. Artifacts are the exception. Unless an artifact is susceptible to damage from a sphere of annihilation, it passes through the sphere unscathed. Anything else that touches the sphere but isn’t wholly engulfed and obliterated by it takes 4d10 force damage.

The sphere is stationary until someone controls it. If you are within 60 feet of an uncontrolled sphere, you can use an action to make a DC 25 Intelligence (Arcana) check. On a success, the sphere levitates in one direction of your choice, up to a number of feet equal to 5 × your Intelligence modifier (minimum 5 feet). On a failure, the sphere moves 10 feet toward you. A creature whose space the sphere enters must succeed on a DC 13 Dexterity saving throw or be touched by it, taking 4d10 force damage.

If you attempt to control a sphere that is under another creature’s control, you make an Intelligence (Arcana) check contested by the other creature’s Intelligence (Arcana) check. The winner of the contest gains control of the sphere and can levitate it as normal.

If the sphere comes into contact with a planar portal, such as that created by the gate spell, or an extradimensional space, such as that within a portable hole, the GM determines randomly what happens, using the following table.

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

While holding this staff, you can use an action to expend 1 of its 10 charges to cast charm person, command, or comprehend languages from it using your spell save DC. The staff can also be used as a magic quarterstaff.

If you are holding the staff and fail a saving throw against an enchantment spell that targets only you, you can turn your failed save into a successful one. You can’t use this property of the staff again until the next dawn. If you succeed on a save against an enchantment spell that targets only you, with or without the staff’s intervention, you can use your reaction to expend 1 charge from the staff and turn the spell back on its caster as if you had cast the spell.

The staff regains 1d8 + 2 expended charges daily at dawn. If you expend the last charge, roll a d20. On a 1, the staff becomes a nonmagical quarterstaff.

Weapon (any axe or sword), rare

You gain a +1 bonus to attack and damage rolls made with this magic weapon.

When you hit a giant with it, the giant takes an extra 2d6 damage of the weapon’s type and must succeed on a DC 15 Strength saving throw or fall prone. For the purpose of this weapon, “giant” refers to any creature with the giant type, including ettins and trolls.

Wondrous item, legendary

This iron bottle has a brass stopper. You can use an action to speak the flask’s command word, targeting a creature that you can see within 60 feet of you. If the target is native to a plane of existence other than the one you’re on, the target must succeed on a DC 17 Wisdom saving throw or be trapped in the flask. If the target has been trapped by the flask before, it has advantage on the saving throw. Once trapped, a creature remains in the flask until released. The flask can hold only one creature at a time. A creature trapped in the flask doesn’t need to breathe, eat, or drink and doesn’t age.

You can use an action to remove the flask’s stopper and release the creature the flask contains. The creature is friendly to you and your companions for 1 hour and obeys your commands for that duration. If you give no commands or give it a command that is likely to result in its death, it defends itself but otherwise takes no actions. At the end of the duration, the creature acts in accordance with its normal disposition and alignment.

An identify spell reveals that a creature is inside the flask, but the only way to determine the type of creature is to open the flask. A newly discovered bottle might already contain a creature chosen by the GM or determined randomly.

Wondrous item, very rare

This painted brass bottle weighs 1 pound. When you use an action to remove the stopper, a cloud of thick smoke flows out of the bottle. At the end of your turn, the smoke disappears with a flash of harmless fire, and an efreeti appears in an unoccupied space within 30 feet of you.

The first time the bottle is opened, the GM rolls to determine what happens.

Wondrous item, uncommon

This box contains a set of parchment cards. A full deck has 34 cards. A deck found as treasure is usually missing 1d20 − 1 cards.

The magic of the deck functions only if cards are drawn at random (you can use an altered deck of playing cards to simulate the deck). You can use an action to draw a card at random from the deck and throw it to the ground at a point within 30 feet of you.

An illusion of one or more creatures forms over the thrown card and remains until dispelled. An illusory creature appears real, of the appropriate size, and behaves as if it were a real creature except that it can do no harm. While you are within 120 feet of the illusory creature and can see it, you can use an action to move it magically anywhere within 30 feet of its card. Any physical interaction with the illusory creature reveals it to be an illusion, because objects pass through it. Someone who uses an action to visually inspect the creature identifies it as illusory with a successful DC 15 Intelligence (Investigation) check. The creature then appears translucent.

The illusion lasts until its card is moved or the illusion is dispelled. When the illusion ends, the image on its card disappears, and that card can’t be used again.