The Lost Bastille - Interior | Walkthrough Dark Souls II Guide
Last update: 11 May 2016
After going through the door, you will have two routes leading to the next boss to choose from. You can pick the left one and go through a narrow corridor, or use go down the stairs on the right side. The first option may be a little difficult, as there are many enemies awaiting you there - but there's a trick to it. Get inside the corridor and back up as soon as the enemies notice you. Throw a single attack and jump back, until you've defeated all the enemies. Go back into the corridor and use the switch to raise the grating. Behind it, another group of enemies awaits you. After getting rid of them, you will be in another corridor - at its end there's a mist leading to the boss room.
The second route leads downstairs. You will encounter enemies on your route, but they won't be packed up in a single place. After reaching the bottom, you will find a corpse lying by a destroyed door - from it you can collect souls and a Human Effigy. NOTE: don't open the single-winged doors on one of the walls, and even if you open them, don't cross them, as you will fall down and die. Use the ladder to get to the upper level. You will encounter two enemies here. You are inside a corridor - at its end there's a mist leading to the boss room. Going along it you can search the nearby cells - in one of them you will find Lucatiel of Mirrah to aid you. Afterwards, go through the mist to enter a boss fight with the Ruin Sentinel's.
After the boss fight, go through the hole in the wall and continue upstairs. You will land on a upper, heavily damaged floor. You can jump to the other side of the balcony to collect a Homeward Bone. Use the passage in the wall and collect the souls from the first cell on the right. Afterwards, run through the corridor without stopping for even a second, as this is a trap.
Light up the bonfire located in the corner of the room. There's a ladder leading down next to it. Get rid of the dog lurking in this room and find a corpse containing souls, lying in the corner of the room, and a chest, where you can find a Priest's Chime. There's a device on one of the walls - use the Pharros Lockstone to activate it. Afterwards, a similar "face-like" device will appear next to the one you've just activated - hit it to unlock a passage leading to the Belfry Luna.