This will help if you're in danger. You can keep your enemy down and capture them for enough time. It can stop an interferer from interfering with your plan. The stone will give you control over someone's life. You can replace the stone and keep doing that for days and days, weeks and weeks, months and months, years and years.
— Marcus to Elijah
The Stone of Death is a powerful, unique, green, flat, ovoid gemstone that has the power to kill someone and keep them dead for twenty four hours straight once the stone is placed on someone's chest over their heart. The stone's affect can be stopped if the stone is turned over with the user's blood on it.