Chloranthy Ring +2
Raises stamina recovery speed. Received after defeating the Executioner's Chariot in New Game Plus.
Clear Bluestone Ring
Reduces casting time. Can be purchased from Carhillion of the Fold in No-Man's Wharf.
Clear Bluestone Ring +1
Reduces casting time. Raises stamina recovery speed. This is found in Shaded Woods, near the Ruined Fork Road bonfire. Take the rightmost, foggy path and stick to the center - the chest that holds this ring is pretty tricky to locate. You'll know you're close when you spot a curse pot.
Clear Bluestone Ring +2
Reduces casting time. Received after defeating the Skeleton Lords in New Game Plus.
Covetous Gold Serpent Ring
Fallen foes are more likely to drop items. To get this, first head to the second section of Iron Keep (with the walkways and greatbow-wielders). Take the ladder in the back, then follow the stairs to a second ladder. This takes you to the roof, where you can drop down some ledges to safety. At the last drop, you can land on the rim of a pot of lava. Loot the corpse in the lava for this ring.
Covetous Gold Serpent Ring +1
Fallen foes are more likely to drop items. Can be purchased from Magerold of Lanafir in Iron Keep. He's found by making a right upon entering the keep proper.
Covetous Gold Serpent Ring +2
Fallen foes are more likely to drop items. Received after defeating the Belfry Gargoyles in New Game Plus.
Covetous Silver Serpent Ring
Fallen foes yield more souls. When you first reach The Lost Bastille, you'll have to shimmy around this ledge; continue around to the left to drop to a large platform. Open the chest here for your ring prize.