Weirdest things I've written are a classic gunbrella that's used as a magic conduit. Take an umbrella, put a gun into it, turn the part that's used to not get hit by rain sturdy as f*ck, make it rotate so you could also use it as a drill or a pizza cutter-y chainsaw and you can also take the main parts apart to use them as sword and shield. It can also used as a form of transport either by gliding or using the drill at full power. It's pretty much a magical deus ex machina multitool, but everything else is as weirdly OP as this or even more ridiculous.
And the Sword of Promised Victory, aka the Fae Blade of Bullshit. It's more or less the arthurian Excalibur. It grants "victory" to everyone starting with its wielder and their allies. But it also grants the opponent "victory" as long as their opponent's definition of victory does not directly clash with the one of the wielders. Can only be wielded by Fae or people that are physically or mentally crippled. (There's no correlation between the conditions!!! -according to the current wielder)