To be honest, neither this knife nor this gun impressed Wen Wen.
The blade can injure ethereal entities, and its durability far exceeds that of ordinary steel knives, with sharpness sufficient to cut through low-level monsters' skins. However, its effect is still far inferior to the Light Sword Wen Wen can casually conjure.
The firearm can also harm ghosts, and it can be infused with certain elemental effects. Coupled with the Demon Hunting Bullet, it's quite threatening to low-level monsters, but it's far from being as effective as Wen Wen's Blazing Tiger Pack of Wolves.
But the advantage of these tools is not in their superior performance but in their capability for mass production!
With the Monster Factory, the Foundation's action teams could completely overhaul their equipment, significantly boosting their overall combat capability. For the ordinary Containment Officers, these two items are also excellent tools.