Tiamats life theft

You cast a spectral spirit at the targeted creature. The the creature must make a con saving throw. On a failed saving throw the targeted creature's health appears around it in a cloud (creature doesn't die just its health is now a cloud) and the spectral spirit will continue to the next creature preceeded as a threat. Repeat the process until a creature preceeded as a threat successfully makes a saving throw. A successful saving  throw negates the effect. When something attacks a creature affected by the spirit the creature recovers an amount of hit points equal to the amount they damaged the creature that is affected.