Magic Items

Wondrous item, very rare (+3) (requires attunement by an artificer)

This simple screwdriver can transform into a variety of tools; as an action, you can touch the item and transform it into any type of artisan's tool of your choice (see the "Equipment" chapter in the Player's Handbook for a list of artisan's tools). Whatever form the tool takes, you are proficient with it. While holding this tool, you gain a bonus to the spell attack rolls and the saving throw DCs of your artificer spells. The bonus is determined by the tool's rarity.

As an action, you can focus on the tool to channel your creative forces. Choose a cantrip that you don't know from any class list. For 8 hours, you can cast that cantrip, and it counts as an artificer cantrip for you. Once this property is used, it can't be used again until the next dawn.

Guardian. The item whispers warnings to its bearer, granting a +2 bonus to initiative if the bearer isn’t incapacitated

This proto-screwdriver was created by a gnome toymaker from Toril. Beautifully engraved on this item's handle is the phrase "for plans best laid".

Source: Tasha's Cauldron of Everything

"A cloak woven by Aerdrie Faenya to commemorate the birth of a new god. Flickering colours dazzle those who gaze into it; you could name at least 29 of them."

Rod, very rare (requires attunement by a Spellcaster)
Glowing cinders orbit the flanged head of this black iron rod.

This rod can be used as an arcane focus. While holding this rod, you gain the following benefits:

Hellish Resistance. You have resistance to fire and necrotic damage.

Searing Rebuke. You can cast the Hellish Rebuke spell as a 4th-level spell (save DC 16) from the rod. Once you use the rod to cast the spell, the rod can’t cast the spell again until the next dawn.

Surge of Brimstone. Whenever you cast a spell that deals fire or necrotic damage, you can use the rod to deal the maximum damage instead of rolling. Once this property is used, it can’t be used again until the next dawn.

Flavor
This rod's head is crafted with immaculate attention given to ensure every single details of Tiamat's five heads are captured as the creator's dream of the dragon queen. One could say that this is a love letter, a praise of her glory, a desire, and utmost dedication of oneself to the dragon queen. When the attuned user activates the rod's property, the five head lets out a mighty roar said to sound exactly like Tiamat's fury.

Short Sword +3 (Sentinel: Fey). "This weapon was once the holy avenger of an ancients paladin. It has since broken and been repaired, losing it's special properties but not its edge. The hilt is clearly that of a holy avenger, but the blade is shattered and covered in markings where it was reassembled."

Wooden Shield +3 with a stylized depiction of White Plume Mountain on it with text: "I went to White Plume and all I got was this Shield" and the Temperate minor property (You are unharmed by temperatures of 0 degrees Fahrenheit or lower, and 100 degrees Fahrenheit or higher)

Staff of Power (Very Rare), fully charged

Weapon (Rapier), Legendary (requires Attunement by a Paladin)

Flavor Text: This weapon's blade contains the remnant of a nature elemental causing its color to alter erratically from the following colors black, blue, red, sapphire, and white.
Minor Property: Harmonious. Attuning to this item takes only 1 minute.

Ring, legendary (requires attunement)

While wearing this ring, you have advantage on saving throws against any spell that targets only you (not in an area of effect). In addition, if you roll a 20 for the save and the spell is 7th level or lower, the spell has no effect on you and instead targets the caster, using the slot level, spell save DC, attack bonus, and spellcasting ability of the caster.

Flavor
Everchanging is a tool forged by Gond, the god of crafting, smithing, and inventiveness. It takes on the form of a key and can easily morph into other tools if needed.