Amber Boros

Wondrous Item, Rare (Requires Attunement by a Druid or Ranger)

This dense amber holds the faint shadow of a coiled draconic serpent. If the attuned creature dies, it immediately returns to life with 4d10 hit points, and adds 1d4 to all its saving throws for 1 minute.

After this effect activates, this item is destroyed.