A voice from nearby shouts rather loudly.
You can thank me for that.
From nearby a single woman stands who quickly blasts a large bout of water into them, it doesn't hurt though it does push them back some, but they quickly realize what its real purpose was, as all the gunpowder and firearms are completely soaked and worthless. The woman simply smiles as she quickly darts away, a nearby man with his sword and shield laughs. The few remaining members of the surviving groups all focus on them, and rush forward to do battle.
Yeah that woman ruined all our gunpowder too, glad she finally hit you all just in time. Now its a bit more fair.