Life Turner
This tiny, spinning hourglass has six seconds' worth of sand inside it and can be easily held or worn as a pendant. When a creature that you can see within 120 feet of you dies, you can use your reaction to speak the hourglass's command word and spin it, allowing you to immediately take an extra turn, interrupting the current turn. At the end of your turn, the dead creature returns to life with a number of hit points equal to your current hit point total (up to its hit point maximum), and you die. If the dead creature was prone, it can immediately stand up (no action required). Once this property has been used, it can't be used again until 1 year has passed.
When you die as a result of using the hourglass, your body is enchanted by protective magic for 3 hours. During this time, if a spell, such as raise dead, has the sole effect of restoring you to life (but not undeath), the caster doesn’t need material components to cast the spell on you. In addition, while you're protected by this magic, you are also under the effect of the gentle repose spell.
It had been her pendant, once; she'd always said the design worked well with her armor. With her proud horns, flowing black hair, and shining plate mail, Charity always seemed untouchable. Alexander was not. They'd met first as fledgeling adventurers, and his arcane skill had always been offset by a frail body. Charity had been his shield, just as he had been her support. Eventually, what began as just a mutually beneficial partnership grew into something more. But all things end eventually, and they had chosen one more job before settling down to care for the family they had only just started. Then Alexander fell. It hadn't been some grand failure, but a series of small mistakes that ended with an arrow through his heart. And then, he stood up. The foes that had torn him down were cleaved in two, and amidst that carnage... was Charity. From then, Alexander raised their daughter alone. She had never known her mother, but in time chose a name to honor her: Grace. She had her mother's features, Alexander's keen eye, and a drive to explore the world inherited from both. Alexander taught her all he knew, and relied on his stories of Charity to supply the rest. And in time, the two began to adventure together, an incredible pair whose teamwork came to save both time and time again. But as Alexander watched his daughter fall, that all collapsed in a moment of swirling confusion. One instant, her smiling face had been before him, shielding him from an arcane assault as he prepared a return volley. The next, all that stood before him was dust. With a roar of grief, he felt the hourglass turn, sand suspended for an instant as the world around him ground to a halt. He was already living on borrowed time, and now he had to return it.