In the Catacombs is a cave with a large pool of water. Baby skeletons continually and infinitely spawn in the water when you step in it. They die with one shot from a large arrow or a jump attack from a two-handed weapon. Equip the Covetous Gold Serpent Ring, and keep killing the baby skeletons to get a lot of humanity. However, you first must defeat some larger enemies in the area before you can easily kill the baby skeletons from a distance with arrows and not worry about getting attacked. The larger enemies throw fireballs, but they have to first charge up, and a hit from an arrow will interrupt them. Note: The baby skeletons' attacks can make you Toxic if they hit you enough. They will also disappear when you defeat them, taking their items with them. Thus, watch for the white glow when you kill one, and immediately grab the humanity before they disappear.