Make a d100 table of nouns and a d100 table of verbs. Every magic item in your campaign is a randomly-generated [noun] of [verb]ing.
this one slaps

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Make a d100 table of nouns and a d100 table of verbs. Every magic item in your campaign is a randomly-generated [noun] of [verb]ing.
this one slaps

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Item Idea: Busker’s Hat
Once worn by a god of travel and song, this hat was given as a gift to his mortal daughter when she first learned to play the fiddle. It’s been handed down to many impressive performers and hungry wanderers, but the tales say the hat will disappear if used to earn more money than you need.
If you hold out the hat to someone who has observed your performance, they must make a Wisdom save (DC equal to half your Performance check) or put a coin in. This also affects creatures who are present throughout the performance, if the hat is visibly set out.
On the Nature of Spellbooks
Spellbooks are tiny monstrosities that Wizards happily call their companions. They are adorned with eyes, teeth, and attitudes. Spellbooks are one of the few creatures capable of viewing spell scrolls without damaging them, moreover they eat spell scrolls. This adding them to the collection of spells contained within.
No one knows where Spellbooks originated. Everyone has a theory, but not one of them is correct, I promise.
As antisocial as Wizards are, they all generally wish to share their Arcane Knowledge with other Wizards. The problem is that Spellbooks do not. The page orders are scrambled, and the text gets warped. Often, a thieving Arcanist will attempt to cast "Locate Precious Metal", only to find themselves casting "Inflict Arthritis" on themselves.
Not just this, but Spellbooks are antisocial with each other too. The Spellbook with the larger assortment of spells cannibalizing the lesser Spellbook in a spray of pages and dust. Thus granting even more spells to the larger Spellbook.
Spellbooks are picky about who they bond to. Spellbooks will only choose individuals the extremely similar magic attunements. A Wizard's Arcane Spellbook will refuse to bond to someone attuned to Divine or Primal Magics. Likewise, a Spellbook used in Demonology would refuse a Wizard.
Many Spellbooks have learned a form of basic communication. Making little animal noises for attention. This invariably leads to them acting like a spoiled cat, making loud noises unless demands are met.
A few times, Wizards have cast "Awaken" on their Spellbook. Each time, the Wizard has issued a statement. "Don't do this".
The Oracle, Triton's Tonic, The Stinging Conch
Probably Bad RPG Item
The Ring of Investment
It's a Ring where you sacrifice your health to, and over the course of your playthrough it gains more HP on it's own and acts as a one time use heal when used, equal to the amount of health in it.

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Feast your eyes on all this cool an kooky weaponry because I finished all of the #maylay prompts!
And now I have to come up with matching characters to wield them.
DnD item idea
A temperamental bag of holding that has a 50/50 chance of spitting out a random item every time it is opened. The opener of the bag must succeed in a dexterity saving throw to avoid being hit in the face by said item and taking 1 point of damage... or maybe more if it throws out a weapon. You can choose to tell your players that it does this, or wait until the coin flip reveals it before you explain that they might have been ripped off back in that sweet little old man’s magicke shoppe.
consider the entertainment potential in these following scenarios:
there are rumours of a plot to assassinate the lord of the city, all wagons are being thoroughly checked at the main gate. The guard opens the bag and the PCs all breathe a sigh of relief when the bag behaves normally...until the guard passes it on to his partner who is hit squarely in the face by a heavy ledger from that abandoned house that they were still hauling around from the start of the campaign. now bargain your way out of jail!
the PCs are now fully aware that the bag does this and try to use it to their advantage. As an enemy charges at them they confidently open the bag in the direction of their attacker and... nothing happens. you take damage and look like an idiot
alternatively... you’ve had terrible rolls all session, you’ve lost all of your weapons and are on your last legs as an enemy charges at you. in a last ditch attempt at defending yourself, you open the bag in his face and he falls to the groud, dead as the single poison tipped arrow that you looted from a body ages ago shoots out straight into his eye. what luck!
(this gets even better/worse if the DM allows the bag to hold living things...)
you’re sneaking around so as to not alert the orc guarding the door to your presence, you cautiously open the bag to retrieve a spell scroll/potion whatever and your noble steed yeets itself out on top of you with a confused neigh. the orc notices and calls for backup, roll for initiative
feel free to play around with the percentages (...and then fill the whole bag with arrows and do in game russian roulette)