@JeremyECrawford Do Mastery of Death or Strength of the Grave function like Death Ward or like Relentless Endurance when it comes to being Disintegrated? I.E. Can they be used after being reduced to 0 or are you disintegrated?

— Eric Green (@quadhund) February 19, 2018

Mastery of Death and Strength of the Grave can be used when you drop to 0 hit points. They don't care how you got to 0. #DnD https://t.co/G6PTnsub45

— Jeremy Crawford (@JeremyECrawford) February 22, 2018