2024 rules reference for Periapt of Wound Closure.
Wondrous Item
While wearing this pendant, you gain the followingbenefits.
Life Preservation. Whenever you make a Death Saving Throw, you can change a roll of 9 or lower to a 10, turning a failed save into a successful one.
Natural Healing Boost. Whenever you roll a Hit Point Die to regain Hit Points, double the number of Hit Points it restores.