Athreos' Sleep

This bottle of shimmering silver liquid contains between 1 and 8 doses. When you drink one or more doses of this potion, you gain the effect of the Power Word Kill and Gentle Repose spells, except Power Word Kill causes you to die regardless of your hit points. After a number of hours equal to the doses consumed, you have a percentage chance of gaining the effect of the Resurrection spell equal to the effectiveness of the potion.