Magic Items

Quor'hin's Hat (Hat of Wizardry)
Wondrous item, common (requires attunement by a wizard)

This antiquated, cone—shaped hat is adorned with gold crescent moons and stars. While you are wearing it, you gain the following benefits:

You can use the hat as a spellcasting focus for your wizard spells.

You can try to cast a cantrip that you don't know. The cantrip must be on the wizard spell list, and you must make a DC 10 Intelligence (Arcana) check. If the check succeeds, you cast the spell. If the check fails, so does the spell, and the action used to cast the spell is wasted. In either case, you can't use this property again until you finish a long rest.
This item is found in Xanathar’s Guide to Everything.

This pirate hat was once worn by Captain Quor’hin of the githyanki Space Galleon Kur’Rakesh. Made of dark purple fabric and trimmed with silver lace, the hat is both a fashion statement and a useful item for any enterprising wizard, all rolled up into one..

Hidden Message. A message is hidden somewhere on the item. It might be visible only at a certain time of the year, under the light of one phase of the moon, or in a specific location.

Weapon (any bow), very rare (requires attunement)

This bow has multiple strings and resembles a lyre or small harp. By strumming the strings while setting an arrow to the bow, you imbue the arrow with magic.

You can play one of the following melodies when you use the bow to make a ranged weapon attack. You must choose to do so before you make the attack roll, and you can play only one melody per attack.

Melody of Precision. If you’re proficient in Performance, you gain a +1 bonus to the attack roll. If you have expertise in Performance, you gain a +2 bonus instead.

Melody of Reverberation. The melody you strum echoes loudly. On a hit, the target takes extra thunder damage equal to your Charisma modifier.

Guardian: The Bow whispers Warnings to it's Owner granting a +2 on Initiative Rolls

The intense psionic scream of a dying elder brain dragon left a psychic splinter in your brain. For the better or worse it grants you resistance against spells and magical effects. Now you have to just find a way how to deal with the voices in your head!

Belt of Storm Giant Strength
DMG'24
p236
Wondrous item, legendary (requires attunement)
While wearing this belt, your Strength score changes to 29. The item has no effect on you if your Strength without the belt is equal to or greater than the belt's score.

Found On: Armaments - Legendary

Staff, legendary (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 you hold it, you gain a +2 bonus to spell attack rolls.

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 d20. On a 20, the staff regains 1d12 + 1 charges.

Spell Absorption. While holding the staff, you have advantage on saving throws against spells. In addition, you can use your reaction when another creature casts a spell that targets only you. If you do, the staff absorbs the magic of the spell, canceling its effect and gaining a number of charges equal to the absorbed spell’s level. However, if doing so brings the staff’s total number of charges above 50, the staff explodes as if you activated its retributive strike (see below).

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 spellcasting ability: conjure elemental (7 charges), dispel magic (3 charges), fireball (7th-level version, 7 charges), flaming sphere (2 charges), ice storm (4 charges), invisibility (2 charges), knock (2 charges), lightning bolt (7th-level version, 7 charges), passwall (5 charges), plane shift (7 charges), telekinesis (5 charges), wall of fire (4 charges), or web (2 charges).

You can also use an action to cast one of the following spells from the staff without using any charges: arcane lock, detect magic, enlarge/reduce, light, mage hand, or protection from evil and good.

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.