Upon entering, look for the Cracked Bell. In the previous patch, you could ignore it. In the UPD version, ringing the bell (with a charged heavy attack) spawns three extra loot chests but triggers a hidden timer. You have 4 minutes to reach the boss door before the Widow starts hunting you through the walls.
Pro Tip: Break the ice statues here. They drop "Glacial Essence," a new currency in the UPD that lets you buy a one-time resurrection at the altar outside the boss fog.
Once inside, the goal is to find three "Jailer's Keys" scattered across the upper balconies to unlock the central cistern leading to the boss. halls of the pale widow upd
Step 1: The First Key (West Balcony)
Step 2: The Second Key (East Kitchen)
Step 3: The Pale Widow's Web
Before you can defeat the boss, you must survive the level. The Halls of the Pale Widow UPD changed the layout of the pre-boss gauntlet. Upon entering, look for the Cracked Bell
A quality-of-life change often overlooked: The Halls originally applied a "Heavy Tide" debuff (-15% movement speed in water). The UPD: This debuff has been removed. You now move at full speed through the flooded corridors, making the run to the boss much less tedious.