My favorite d20 goes missing from time to time. I've had it for nearly 20 years, and it disappears for months and then shows up again. None of my other dice do this. I can't just replace it. I would know it's not the same piece.
And that's how I ended up ordering a whole new set of dice today. 🤦♀️
The new dice will go well with the ones I already have for divination work. Similar, so they all go together. Different, so I can easily tell them apart when used together in a reading. And having a whole second set opens possibilities.
I will still be frustrated that I cannot find the piece that repeatedly goes missing.