You mediate on your life's importance and infuse yourself with a measure of protection against death.

The first time you drop to 0 hit points due to taking damage, the spell's material component explodes in divine energy and is consumed. You're restored to 25 hit points. Also, you and each creature of your choice within 30ft of you that you see regains 1d10 hit points and can add 1d4 to all dice rolls until the end of your next turn. If the spell's still in effect when you're subjected to an effect that would instantly kill you without dealing damage, that effect's negated as the diamond explodes. The same bonus to hit points and roll effects as normal. The spell then ends.

Also, this spell ends on you if the material component ever leaves your person.