A medallion with crimson amber inlaid. Greatly boosts maximum HP. The Erdtree’s old sap becomes amber, treasured as the most precious of jewels in the age of Godfrey, the first Elden Lord. A primordial life energy resides inside.

Where to Find the Crimson Amber Medallion +1

You can find it in the Volcano Manor legacy dungeon, behind a fog gate that can be unlocked by spending 1x Stonesword Key.