[khorboth]

In a fantasy campaign, I gave a cult magic curtains which blocked all light. That's it. They sealed to the window or door and blocked light. The players took them down. Never sold them. Strung them up at every inn they ever stayed at for the rest of forever.

In Dragonlance chronicles, I had one character take worthless but historically relevant clay coins from the first act and carry them through the entire campaign. Through hell and back.