Haligtree Secret Medallion (Left) is a Key Item in Elden Ring.
This item is part of Latenna the Albinauric's questline.
Left half of a split medallion depicting the Haligtree.
Brandishing the medallion with both halves conjoined will activate the Grand Lift of Rold, granting access to a hidden path.
In other words, this secret medallion will guide the bearer to the land of Miquella's Haligtree.
Area: atop the tower past Commander Niall.
Alongside the Haligtree Secret Medallion (Right) of Old Albus, operates the Grand Lift of Rold to open the path to the Consecrated Snowfield.