Undead Crypt (1)

Before going upstairs, go to the left to find a bonfire inside the alcove there. Activate it and check the corner on the other side of the stairs to find a skeleton containing a Radiant Lifegem. Continue upstairs and kill the undead inside. Go to the second area where there's three sorceresses who will lob projectiles towards you. As you approach them, be careful of the undead lurking around the pillars. They can cast spells quickly and successively so the best way to deal with them is up close and personal.

After taking out the sorceresses, follow the path to the next room. As soon as you enter, you'll hear a voice telling you not to produce ligh. If you look to your right, there's an elevated ledge with several gravekeepers. Attack one and you'll aggro all of them. Fall back to the corridor where you came from so you can easily pick them off one by one. Go to the ledge and loot the corpse to get a Large Soul of a Nameless Soldier. Talk to Agdayne and exhaust his dialogue options and you'll be able to buy from him. You'll also learn the "Have Mercy" gesture from him.

Undead Ditch

Continue along the path and you'll find a misty doorway ahead. Go upstairs and defeat / run away from the two heavy knights and enter the mist (safe). The next area is filled with stones and tombstones. Some of them will continously spawn undead and the tombstone will spawn spectres so make sure to destroy them quickly. As soon as you enter the room, turn to the right to find a wooden statue. Destroy it to prevent spectres from appearing and to clear the path. Loot the skeleton in the corner to get a Titanite Chunk and Petrified Dragon Bone.

Now climb the ladder nearby and kill the sorceress. Loot the chest to get Dried Fingers, Bonfire Ascetic and Twinkling Titanite. Climb down the ladder then make your way to the left side of the room. Loot the skeleton in the corner to get a Simpleton's Spice and Black Firebomb x2. There's also a bonfire nearby.

Make your way to the other side of the room and enter the next one. Use wide attacks to destroy the obstacles and the tombstone at once. Loot the Soul of a Lost Undead from the skeleton beside the stairs then move to the left corner to find another tomsbtone. Destroy it and defeat the spectre. Loot the skeleton a Bracing Knuckle Ring +1.

Continue to the next room and you'll be attacked by an invader, Nameless Usurper. After defeating it, loot the skeleton in the room to get a Divine Blessing and Soul of a Hero. Continue to the next room and beware of the ghosts that will attack you from the sides. Shortly you'll encounter a heavy steel wall. These are actually shields of enemies behind them so keep your distance or lure them back so you can attack them when they turn their backs on you.