Amulet of Decreed Protection

This heavy, dull silver amulet is adorned with a single large ruby. While attuned to this amulet, the next time you are reduced to 0 hit points, you instead drop to 1 hit point then gain a number of temporary hit points equal to ten times your level for 1 minute. Once this effect is activated, roll a d20. On a roll of 1, the amulet is destroyed once the temporary hit points are gone. On any other roll, the amulet can't be activated again before the next dawn.

Notes: Warding