Skeleton Ball

Location

Found in two locations in Catacombs of Carthus. One rolls back and forth along a large, open staircase close to the entrance of the level, while the other rolls back and forth along a narrow hallway next to the Catacombs of Carthus bonfire.

Notes

• It only stops once the Skeleton with a pointy hat is killed. Upon killing this skeleton, the boulder will break when it next smashes into a wall
• Can damage and kill enemies.
• When the first boulder breaks, it will leave behind one Undead Bone Shard.
• When the second boulder breaks, it will leave behind a Titanite Slab and Uno Pequeño.

Information here is accurate for version 2.15.