Yetka's Dagger (Optional)

After speaking with Yetka, turn around and head back past the Checkpoint (an auto-save point you restart from on death) Crystal (a place where you can save your progress and respawn (be brought back to life at a checkpoint after death) enemies) for the tower ahead.

Climb the stairs to reach the roof of the South Watchtower.

Eliminate the Crossbowman in the distance with your gauntlet, using the wall as cover (press the cover button to crouch behind walls or objects) between shots.

Tackle the Infected near the top of the stairs.

Climb down the next set of stairs to find an Audio Note (Grim places: Fancy Looks) at the bottom.

Enter the room on the right and kill the Marauder.

Loot the chest near where the Marauder was to find a Fire Resistance Shard and a Weapon (Shortsword – Lethal Secret).

Go through the open doorway and fight off the Rogue.

Find a lever to open the gate leading outside for a shortcut to the Main Wall and a chest containing a Magic Resistance Shard, a Weapon (Hammer - Pain), and a piece of Armour (Chest - Live Elements).

Return to where you fought the Marauder and find the stairs leading down.

In the room below, you will encounter a new enemy: a Spider.

The Spider has several attacks: Melee Swings (short range), Leap Attack (can knock you down and do significant damage), Poison Spit (causes damage over time), and Summon (lays eggs that spawn Baby Spiders).

To defeat the Spider, avoid its attacks. When it lays an egg, it becomes immobilized for 3-4 seconds, allowing you to inflict significant damage. You can also fight it at range with your gauntlet or up close with a melee weapon, dodging or blocking its attacks. Alternatively, stay near the entrance, shoot the spider with your gauntlet once or twice, and retreat up the stairs, repeating until it is dead.

Warning: The Spider is a very tough enemy at this stage and its leap attack can be a one-shot kill. If it is too difficult, you can return later in the game.

In the room the Spider inhabited, find a chest containing a Magic Energy Shard and a Weapon (Greathammer - Spike).

Note: On New Game +, there is also an Audio Note (Keystone) in this room.

Return upstairs and move to the edge of the cliff at the base of the stairs leading to the roof.

Over the edge, you should spot a small platform with an item on it. Drop down to this and pick up the Tower Key.