Home brewing your own magic items for D&D is quite a bit of fun. Your players will find ways to break the game with them, of course, but let them! For you both it will be a game of discovery if the items are unusual and unknown.
Some of these were inspired by other homebrew items I came across. I wish I had saved the author for them so I could give credit to them.
If you do wind up using these in your campaign, let me know! I’d love to hear how your players wound up using them.