The Melancholy of Sir Artor

Also fondly referred to as the Emo Staff nowadays, the staff's metal is a dull color lacking all luster that actually seems to draw light into itself, creating a pocket of localized gloom when drawn.

When commanded, the Melancholy of Sir Artor projects a field of total apathy that spreads to cover a fair-sized battlefield. Any creature caught within Melancholy of Sir Artor's sphere of influence immediately loses all interest in life and slumps to the ground in a state of profound depression. They are incapable of movement and take no notice of hunger, thirst, or exposure to elements. They will eventually die of deprivation if the Melancholy of Sir Artor is not deactivated.

The critical drawback is that not even the wielder is spared this effect. In fact, once they draw the weapon, they cannot find the motivation to deactivate it, making the choice to use the Melancholy of Sir Artor the last one they make. Needless to say, no one loves the Melancholy of Sir Artor.