M (diamonds worth 300 sp, consumed)
As two actions, you can create a vial of liquid with a humanoid shape suspended in it that continuously has its head sewn onto its body. As an action, you can feed this potion to a creature that has died within the last minute. That creature returns to life with 1 health. This effect can’t return to life a creature that has died of old age, nor can it restore any missing body parts.