>>151121853
Yoru's powers as the war devil consist on allowing her to turn anything she owns (from her perspective) into a weapon of her choice.
At some point on her fight against Pochita she replaced her arms with the bodies of her children (The Gun Devil and the Tank Devil) because she thinks she owns the lives of her offspring.
With the power of the Gun devil she can point at someone or something to shoot them (Same power Makima had)
But she can also use all the contracts the gun devil had causing pic related to happen and transforming the Statue of liberty into a living turret that can destroy entire cities in Japan shooting all the way from the US, each attack consumes more index fingers apparently