Elixir of Life

This potion restores to life a creature which died in the last five rounds or is at zero hit points from spells, wounds or poison. It will not save creatures that died of old age or disease. The creature is conscious with 1 hit point per level or hit die and needs to rest for one day (one long rest) for every failed death save before the elixir was administered, minimum one day. The creature will not regain hit points from any natural means until it completes the required day(s) of rest. Every die of healing from Cure Wounds or an equivalent spell or something like Lay on Hands (5 HP per die), counts as one day of rest.