In Dark Souls for the PS3 and Xbox 360, you can find the Covetous Gold Serpent Ring which gives you more items when killing enemies.
The Covetous Gold Serpent Ring is found in Sen’s Fortress. When you navigate past the area with the boulders, you’ll come to a room with a lever that controls the boulders. Wait here for a moment to let a few more boulders drop (around 5 or 6), and then pull the lever, which will make the boulders roll in a different direction.
Go back the way you came, and you’ll come to a spot where the boulders have stacked up in a hole allowing you to access a new path, and in this path a boulder has cracked a hole in the wall which the Covetous Gold Serpent Ring is hidden in.
