Inside, next to a dead adventurer is a pedestal with an Ancient Edict and an Emerald Dragon Claw. There is also an Orichalcum Ore Vein and a wide variety of mushrooms. The claw opens a series of four doors, but the fifth door requires an Ivory Dragon Claw.
There is a hidden chest on a platform opposite to the door. it can be reached by climbing on the tree and using Whirlwind Sprint. Another locked chest is down in the water bellow.