Mutants fanaus weapons
Cinder uses fans that can make control wind and water to a degree. They even make ices.
Mercury wields a Ordachi. A sword that can open portal to other Dimensions or transport him to another place in revenant be at miles away or five feet in front of him. He doesn’t have a best grip on that yet.
Nora wields a hand hammer and a chain whip together. The chainwhip blows up most grimm on contact and only Nora can even hold up the Hammer.(Also Splinter.) The chainwhip can grow in length.
Jaune:Techstaff that can turn into a multitude of things from a hammer, buzzsaw spear, etc.