Magic Items

Wondrous Item, rare (requires attunement by a sorcerer), language minor property (Aquan)
This crackling crystal contains the essence of an elemental plane. As an action, you can attach the shard to a Tiny object (such as a weapon or a piece of jewelry) or detach it. It falls off if your attunement to it ends. You can use the shard as a spellcasting focus while you hold or wear it.
Water. You create a wave of water that bursts out from you in a 10-foot radius. Each creature of your choice that you can see in that area takes 2d6 cold damage and must succeed on a Strength saving throw against your spell save DC or be pushed 10 feet away from you and fall prone.
This item is found in Tasha’s Cauldron of Everything.
This elemental essence shard (water) is a block of ice that never melts encasing constantly moving water. Encased in the frozen exterior, the water churns and swirls with an ethereal luminosity, capturing the essence of the evershifting tides. Shades of cerulean and glacial blues converge, forming delicate patterns reminiscent of frozen fractals. When touched, the ice remains cool to the skin, exuding a refreshing mist and a faint melodic hum as if echoing the distant melody of ocean waves.
The bearer can speak and understand the Aquan dialect of Primordial.

The hilt lying on the floor is carved to resemble a bronze dragon with its wings spread and its mouth agape. This device is a sun blade that has held many names over the years, including Sunlight’s Wrath and Shar’s Bane. A legend lore spell reveals its true name (Scintilmorn) and its original purpose: to destroy vampires and other creatures of the night.

which has the additional property of granting its wearer darkvision out to a range of 60 feet.

Shield, very rare (requires attunement)

While holding this Shield, you have Advantage on saving throws against spells and other magical effects, and spell attack rolls have Disadvantage against you.

Wondrous item, common

This horn has 4 charges and regains 1d4 expended charges daily at dawn. As a Magic action, you can blow the horn while expending 1 charge. One creature of your choice hears the horn's blare, provided that creature is within 600 feet of the horn. No other creature hears the horn.

Armor (medium or heavy, but not hide), uncommon

Mithral is a light, flexible metal. A mithral chain shirt or breastplate can be worn under normal clothes. If the armor normally imposes disadvantage on Dexterity (Stealth) checks or has a Strength requirement, the mithral version of the armor doesn’t.