1. go down the ladder once
2. climb up again while holding left
3. walk/roll into the side walls
4. roll/walk over the rock blocking the path
5. either roll down next to the merchant for depths skip or walk over the connection between sewer and tower as seen in the video to reach lower undead burg
(optional step: while standing on the sewer ceiling you can jump into the Capra demon's arena to kill him without going through the enemies
