Re:Zero

Triggered automatically upon death otherwise if used when alive or above 0 HP it does nothing. You are marked by the favor of Witch of Envy Satella — a being beyond mortal comprehension, whose love for you is suffocating, eternal, and terrifying. She refuses to let you go. Each time your life slips from your body, her will drags you back, distorting time itself in a desperate embrace. When you die, the Witch rewinds reality by one round (6 seconds), returning you to the start of your previous turn, with all events that occurred in that round undone — except in your memory. You regain consciousness at the hit points you had at that moment, in the same position, with your turn about to begin.