After equipping the weapon, press the number 1 key to switch weapons. Switching weapons also fully restores your Fury meter. Note that there is a short cooldown for switching.
After obtaining the weapon, climb up the ladder on the right. At the top, you'll find a save point, and behind the box to the right is a material for weapon enhancement.
Save your progress and continue forward. After a few steps, interact with the wall on the right to obtain Dust.
Continue forward and you'll see a group of enemies. However, these enemies don't belong to the same gang and will fight each other. You can join the fray directly or watch from the sidelines for a while.
Defeat the skeleton enemy ahead to obtain the offensive accessory "Strength Band."

