why Mouse is nil value in my script??? please answer

this script in serverscriptservice and its not working its an event script

console.script1Beast.OnServerEvent:connect(function(p, Mouse)
	--creation by missingboshjio
--for r6
local a
local b
local c
local d
local e
local f
local g
local h
local version = {"1.0"}

local c = p.Character
local hum = c.Humanoid
local m = Mouse
local t = c.Torso
local hrp = c.HumanoidRootPart
local hed = c.Head
local ril = c["Right Leg"]
local lel = c["Left Leg"]
local ria = c["Right Arm"]
local lea = c["Left Arm"]
local targetI = nil
local intro = true
local death = false

spawn(function()
    while wait() do
        hed.BrickColor = BrickColor.new("Maroon")
        ria.BrickColor = BrickColor.new("Maroon")
        lea.BrickColor = BrickColor.new("Maroon")
        t.BrickColor = BrickColor.new("Maroon")
        ril.BrickColor = BrickColor.new("Maroon")
        lel.BrickColor = BrickColor.new("Maroon")
		local ff = Instance.new("ForceField")
		ff.Parent = t
		wait()
		ff.Parent = hrp
		ff.Visible = false
		local fire = Instance.new("Fire", t)
		fire.Heat = 5
		fire.Size = 5
		fire.Color = Color3.new(117,0,0)
		wait(0.1)
		t.Anchored = true
		local crown = Instance.new("Part", c)
		crown:BreakJoints()
		crown.CanCollide = false
		crown.Name = "crown"
		crown.Transparency = 0.9
		crown.Size = Vector3.new(100,25,100)
		crown.BrickColor = BrickColor.new("Maroon")
		local crownmesh = Instance.new("SpecialMesh", crown)
		crownmesh.Name = "crownmesh"
		crownmesh.MeshId = "http://www.roblox.com/asset/?id=1078075"
		crownmesh.Scale = Vector3.new(100,25,100)
		local crownweld = Instance.new("Weld", crown)
		crownweld.Name = "crownweld"
		crownweld.Part0 = t
		crownweld.Part1 = crown
		wait(0.1)
		crown.Transparency = 0.8
		wait(0.1)
		crown.Transparency = 0.7
		wait(0.1)
		crown.Transparency = 0.6
		wait(0.1)
		crown.Transparency = 0.5
		wait(0.1)
		crown.Transparency = 0.4
		wait(0.1)
		crown.Transparency = 0.3
		wait(0.1)
		crown.Transparency = 0.2
		wait(0.1)
		crown.Transparency = 0.1
		wait(0.1)
		crown.Transparency = 0
		wait(2)
		local ex = Instance.new("Part", c)
		ex:BreakJoints()
		ex.CanCollide = false
		ex.Name = "explosion"
		ex.Transparency = 0
		ex.Size = Vector3.new(1,1,1)
		ex.BrickColor = BrickColor.new("Really red")
		ex.Material = Enum.Material.Neon
		ex.Shape = "Ball"
		local exweld = Instance.new("Weld", crown)
		exweld.Name = "exweld"
		exweld.Part0 = t
		exweld.Part1 = ex
		local explosionsound = Instance.new("Sound", ex)
		explosionsound.SoundId = "rbxassetid://2770705399"
		explosionsound.Volume = 5
		explosionsound.PlaybackSpeed = 0.5
		explosionsound:Play()
		wait(0.5)
		ex.Size = Vector3.new(10,10,10)
		wait(0.5)
		ex.Size = Vector3.new(25,25,25)
		wait(0.5)
		ex.Size = Vector3.new(50,50,50)
		wait(0.5)
		ex.Size = Vector3.new(75,75,75)
		wait(0.5)
		ex.Size = Vector3.new(90,90,90)
		wait(0.5)
		ex.Size = Vector3.new(100,100,100)
		wait(0.5)
		ex:Destroy()
		crown:Destroy()
		
		local sound = Instance.new("Sound", t)
		sound.Name = "lol"
		sound.Looped = true
		sound.SoundId = "rbxassetid://2526061641"
		sound:Play()
		
		while true do
			wait(1)
			t.Anchored = false
			hed.face.Texture = "http://www.roblox.com/asset/?id=328783763"
			hum.WalkSpeed = 25
		end
    end
end)

local txt = Instance.new("BillboardGui", c)
txt.Adornee = hed
txt.Name = "nil2"
txt.Size = UDim2.new(2, 0, 1.2, 0)
txt.StudsOffset = Vector3.new(-7.2, 3.5, 0)
local text = Instance.new("TextLabel", txt)
text.Size = UDim2.new(10, 0, 7, 0)
text.FontSize = "Size12"
text.TextColor3 = Color3.new(117,0,0)
text.TextScaled = false
text.TextTransparency = 0
text.BackgroundTransparency = 1
text.TextTransparency = 0
text.TextStrokeTransparency = 1
text.Font = Enum.Font.GothamBold
text.TextStrokeColor3 = Color3.new(0, 0, 0)
text.Text = "-- Beast"

m.Button1Down:connect(function()
	local hitbox = Instance.new("Part", ria)
	hitbox.Transparency = 1
	hitbox.CFrame = ria.CFrame
	hitbox.Parent = c
	hitbox.Name = "hitbox"
	hitbox.Size = Vector3.new(2,2,2)
	hitbox.CFrame = ria.CFrame
	hitbox:BreakJoints()
	hitbox.CanCollide = false
	hitbox.BrickColor = BrickColor.new("Medium Stone")
	hitbox.TopSurface = "Smooth"
	hitbox.BottomSurface = "Smooth"
	hitboxweld = Instance.new("Weld")
	hitboxweld.Name = " "
	hitboxweld.Part0 = ria

parameter can't be mouse. you will get nil.

you can use anything in the parameter but you can't access Mouse from the normal script, you need to do it on a local script instead