Magic Items

Greatsword, legendary (requires attunement by a creature of the weapon's choice)
Of all the magic items created by elves, one of the most prized and jealously guarded is a Moonblade. In ancient times, nearly all elven noble houses claimed one such weapon. Over the centuries, some of these weapons have faded from the world, their magic lost as family lines have become extinct. Others have vanished with their bearers during great quests. Thus, only a few of these weapons remain.

Every Moonblade longs for a bearer whose disposition and goals are compatible with its own. If you try to attune to a Moonblade that doesn't want you as its bearer, the weapon not only rejects you but also places a curse on you, causing you to make D20 Tests with Disadvantage for 24 hours or until the curse is ended by a Remove Curse spell or similar magic. If you're accepted by the weapon and try to attune to it, you become attuned to it instantly, and a new rune appears on it. You remain attuned to the weapon until you die or the weapon is destroyed. A Moonblade functions like a nonmagical weapon of its kind for anyone other than its chosen bearer.

A Moonblade has one rune on it for each bearer it has willingly served (in this case: 7). The first rune grants a +1 bonus to attack rolls and damage rolls made with this magic weapon. Each rune beyond the first grants the Moonblade an additional property. The DM chooses each property or determines it randomly by rolling on the Moonblade Properties table.

Runes:

increase attack and damage by +1
increase attack and damage by +1
increase attack and damage by +1
deal an extra 1d6 force damage
deal an extra 1d6 force damage
deal an extra 1d6 force damage
score a critical hit on a roll of 19 or 20 on the d20

The next time any creature attunes to this item, it would gain the following rune: "The Moonblade gains Thrown with a normal range of 20 feet and a long range of 60 feet. Each time you throw the weapon, it flies back to your hand after the attack." (the DM may choose otherwise)

Minor Property. In addition to its aforementioned properties, each Moonblade has a minor property determined by rolling on the Magic Item's Minor Property table.

Sentinel: Undead. This item glows faintly when such creatures are within 120 feet of it.

Sentience. A Moonblade is a sentient weapon with an Intelligence of 12, a Wisdom of 10, and a Charisma of 12. It has hearing and Darkvision out to 120 feet. Its alignment matches that of its creator.

The weapon communicates by transmitting emotions, sending a tingling sensation through the wielder's hand when it wants to communicate something it has sensed. It can communicate through visions or dreams when the wielder is either in a trance or asleep.

Personality. A Moonblade has a personality similar to that of its creator. Once a Moonblade has decided on an owner, it believes that only that person should wield it, even if the bearer's alignment differs from that of the weapon's or the bearer's goals later clash with the weapon's goals. Dawnreaver has been wielded by generations of elven paladins following Tyr, Helm and Lathander (and similar gods lost in tradition). Its ideals are protecting the weak, fighting for what is right and smiting those that wish harm upon the innocent. It will allow attunement by creatures that resemble these values.

The flame of this candle is not extinguished when immersed in water. It gives off light and heat like a normal candle.

Your Constitution score increases by 2, up to a maximum of 22.

This bag superficially resembles a Bag of Holding but is a feeding orifice for a gigantic extra dimensional creature. Turning the bag inside out closes the orifice.

The extra dimensional creature attached to the bag can sense whatever is placed inside the bag. Animal or vegetable matter placed wholly in the bag is devoured and lost forever. When part of a living creature is placed in the bag, as happens when someone reaches inside it, there is a 50 percent chance that the creature is pulled inside the bag. A creature inside the bag can use its action to try to escape with a successful DC 15 Strength check.
Another creature can use its action to reach into the bag to pull a creature out, doing so with a successful DC 20 Strength check (provided it isn't pulled inside the bag first). Any creature that starts its turn inside the bag is devoured, its body destroyed.

Inanimate objects can be stored in the bag, which can hold a cubic foot of such material. However, once each day, the bag swallows any objects inside it and spits them out into another plane of existence. The DM determines the time and plane.

If the bag is pierced or torn, it is destroyed, and anything contained within it is transported to a random location on the Astral Plane.

Ambledragon said this bag would help cover up mistakes and deal with challenging individuals. I wonder how many “mistakes” he has used it on in the past….

This item can be found in the ​Dungeon Master’s Guide.

This wondrous item can be a scepter, an orb, an amulet, a crystal, or another finely crafted object. It typically incorporates imagery of dragons’ wings, claws, teeth, or scales. Due to the strange magic that trapped Amaranthraxine’s spirit in the walls of Xorvintroth, this hoard item can’t increase or decrease in power.

You have advantage on initiative rolls.
While you are holding the focus, it can function as a spellcasting focus for all your spells.
Whenever you use a spell slot to cast a spell, you can immediately teleport to an unoccupied space you can see within 15 feet of you.
While you are holding the focus, you can use it to cast the following spells: Rary’s telepathic bond, Raulothim’s psychic lance. Once the item is used to cast a spell, it can’t be used to cast that spell again until the next dawn.
When you cast a spell of 1st level or higher while holding this focus, you can treat the spell as if it were cast using a 9th-level spell slot. Once this property is used, it can’t be used again until the next dawn.

While wearing this cap underwater, you can speak its command word as an action to create a bubble of air around your head. It allows you to breathe normally underwater. This bubble stays with you until you speak the command word again, the cap is removed, or you are no longer underwater.