Magic Items

Ring of Mind Shielding
Ring, uncommon (requires attunement)
While wearing this ring, you are immune to magic that allows other creatures to read your thoughts, determine whether you are lying, know your alignment, or know your creature type. Creatures can telepathically communicate with you only if you allow it.

You can use an action to cause the ring to become invisible until you use another action to make it visible, until you remove the ring, or until you die.

If you die while wearing the ring, your soul enters it, unless it already houses a soul. You can remain in the ring or depart for the afterlife. As long as your soul is in the ring, you can telepathically communicate with any creature wearing it. A wearer can't prevent this telepathic communication.

Rope of Mending
Wondrous Item, Common

This 50-foot coil of rope can repair itself when cut into any number of smaller pieces. As a Magic action, you can cause all pieces of the rope that are in contact with each other and not otherwise in use to knit back together. A Rope of Mending is forever shortened if a section of it is lost or destroyed.

Temperate. You are unharmed by temperatures of 0 degrees Fahrenheit or lower, and 100 degrees Fahrenheit or higher.

Serpent Scale Armor
Armor (scale mail), uncommon

This suit of magic armor is made from shimmering scales. While wearing it, you can apply your full Dexterity modifier (instead of a maximum of +2) when determining your Armor Class. In addition, this armor does not impose disadvantage on your Dexterity (Stealth) checks.

Serpent's Fang
Weapon (longsword), rare

This single-edged magic sword is made from the scrimshawed fang of a giant serpent. Its hilt changes shape to adjust to the grasp of any creature that picks it up. The weapon deals an extra 1d10 poison damage to any target it hits.

Staff of Charming
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.

Tentacle Rod
Rod, rare (requires attunement), Table G

Made by the drow, this rod is a magic weapon that ends in three rubbery tentacles. While holding the rod, you can use an action to direct each tentacle to attack a creature you can see within 15 feet of you.

Each tentacle makes a melee attack roll with a +9 bonus. On a hit, the tentacle deals 1d6 bludgeoning damage. If you hit a target with all three tentacles, it must make a DC 15 Constitution saving throw.

On a failure, the creature's speed is halved, it has disadvantage on Dexterity saving throws, and it can't use reactions for 1 minute. Moreover, on each of its turns, it can take either an action or a bonus action, but not both. At the end of each of its turns, it can repeat the saving throw, ending the effect on itself on a success.
This item can be found on page 208 of the Dungeon Master's Guide.

Thurûmkhar (Half Plate Armor +1 /Guardian)
Armor (Half Plate Armor), Rare

You have a +1 bonus to Armor Class while wearing this armor.

Guardian. The item warns you, granting a +2 bonus to your Initiative rolls if you don’t have the Incapacitated condition.

This Armor was onced forged by the Dwarves of the Earthsunder Clan. They named it Thurûmkhar. a combination of Thurûm (”thoughtfulness, wisdom“) and Khar (”eye, gaze"), which could mean ‘wise gaze’ or ‘mindful mind’.
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Wand of Fireballs
Wand, rare (requires attunement by a spellcaster)

This wand has 7 charges. While holding it, you can use an action to expend 1 or more of its charges to cast the fireball spell (save DC 15) from it. For 1 charge, you cast the 3rd-level version of the spell. You can increase the spell slot level by one for each additional charge you expend.

The wand regains 1d6 + 1 expended charges daily at dawn. If you expend the wand’s last charge, roll a d20. On a 1, the wand crumbles into ashes and is destroyed.

Wand of Secrets
Wand, uncommon
The wand has 3 charges. While holding it, you can use an action to expend 1 of its charges, and if a secret door or trap is within 30 feet of you, the wand pulses and points at the one nearest to you. The wand regains 1d3 expended charges daily at dawn.

By whispering a secret to themselves that they have never told anyone, the owner can cause the tip of this wand to glow with light equal to a candle.