Serpent-God's Curved Sword

Obtaining

 * Found on a corpse in Ruin-Strewn Precipice (Liurnia of the Lakes).
 * From the Ruin-Strewn Precipice Overlook site of grace, take the elevator down and look for a ladder opposite of the singing Giant Bats that leads up. Follow the plank onto a roof overlooking the area. The corpse is on the farthest side, guarded by several Land Octopi.