how do i make it damage multiple humanoids??

local remote = game.ReplicatedStorage.Mera3
remote.OnServerEvent:Connect(function(plr,Mouse,db)
	local dmg = false
	db = true
	local FP = game.ReplicatedStorage.BF:Clone()
	FP.Parent = plr.Character["Right Arm"]
	local Kew = game.ReplicatedStorage.BFF:Clone()
	Kew.Parent = plr.Character["Right Arm"]
	local fefe = game.ReplicatedStorage.BF:Clone()
	local par = Instance.new("Part")
	par.Transparency = 1
	par.CanCollide = false
	par.Size = Vector3.new(20,20,20)
	par.CFrame = plr.Character["Right Arm"].CFrame * CFrame.new(0,0,-1)
	par.Parent = game.Workspace
	Kew.Parent = par
	local effect = Instance.new("Part")
	effect.Size = Vector3.new(10,10,10)
	effect.Shape = "Ball"
	effect.FrontSurface = "Smooth"
	effect.BackSurface = "Smooth"
	effect.Anchored = false
	effect.CanCollide = false
	local eo = Instance.new("Smoke")
	eo.Size = 10
	eo.Color = Color3.new("Grey")
	eo.Parent = effect
	effect.Material = "Neon"
	effect.BrickColor = BrickColor.new("Bright orange")
	effect.Transparency = 0.6
	effect.CFrame = plr.Character["Left Arm"].CFrame * CFrame.new(0,0,-8) 
	effect.Parent = game.Workspace
	local BV = Instance.new("BodyVelocity")
	BV.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
	BV.Velocity = Mouse.lookVector*90
	BV.Parent = effect
	fefe.Parent = effect
	
	
	
    
effect.Touched:Connect(function(hit)
			local hum = hit.Parent:FindFirstChild("Humanoid")
			if hit.Parent:FindFirstChild("Humanoid") == nil then return end
			if dmg == false then
				dmg = true
				if hum.Parent == plr.Character then
		        hum.Health = hum.Health - 0
				else 
					hum.Health = hum.Health -  45
		   end
	    end
	end)
	wait(4)
	 plr.Character["Right Arm"].Transparency = 0
	FP:Destroy()
	effect:Destroy()
	db = false
end)