Help with my magicsphere?

My magicsphere is supposed to fire out a lot of spheres and then if a player touches the sphere they die.This is the script

Player = game.Players.LocalPlayer
LazerSphear = script.Parent
Mana = 10
mouse = Player:GetMouse()
function Magic()
	Mana = Mana -0.6
	for MagicAffects = 1,20 do
		script.Parent.Handle:Clone()
		if script.Parent.Handle:FindFirstChild("Humanoid") ~= nil and Humanoid.Health not == 0 then
			Humanoid.Health = 0
		end
	end
end

You never assigned the variable "Humanoid" to anything. You could do

local Humanoid = script.Parent.Handle:FindFirstChild("Humanoid")
if Humanoid and Humanoid.Health ~= 0 then
Humanoid.Health = 0
end