How do I use the same variable in a regular script in a local script?

Ice projectile variable in a regular script, but I can't figure out a way to access it in my local script. I've tried understanding FireClient() but for the life of me I just can't. Or would I need a module script for this?(don't know how to use them)

Regular Script:

---------[IceSpike]--------------------------------------------------
local IceSpikeEvent = game.ReplicatedStorage.MagicEvents.IceSpikeEvent
enabled = true

IceSpikeEvent.OnServerEvent:connect(function()
	if not enabled then return end
	local projectile = Instance.new("Part")
	projectile.Size = Vector3.new(2,11,2)
	projectile.BrickColor = BrickColor.new("Pastel Blue")
	projectile.CanCollide = false
	local projectileMesh= Instance.new("SpecialMesh", projectile)
	projectileMesh.MeshId = "rbxassetid://3508829528"
	projectileMesh.Scale = Vector3.new(1,0.8,1)
	local projectileEffect = Instance.new("Smoke", projectile)
	local projectileVelo = Instance.new("BodyVelocity", projectile)
	projectileVelo.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
	projectile.Parent = workspace
	game.Debris:AddItem(projectile, 1.5)
	enabled = false
	wait(2)
	enabled = true
end)

Local Script:

local IceSpikeEvent = game.ReplicatedStorage.MagicEvents.IceSpikeEvent
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()

mouse.KeyDown:connect(function(key)
	if key == "e" then
		IceSpikeEvent:FireServer()
		projectile.CFrame = CFrame.new(player.Character.Torso.Position) --help
		projectileVelo.Velocity = player.Character.Torso.CFrame.lookVector * 150
	end
end)

this is how I did it, when I need it.

put local script and server script in the same model, create a value instance in the model, say number, string, object, vector3, whatever you choose. server script updates the value, local scripts read the value.

You would need to use a Remote Function so that your projectile object yields back to your local script. Like this :

Local Script:

local IceSpikeEvent = game.ReplicatedStorage.MagicEvents.IceSpikeEvent
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()

mouse.KeyDown:connect(function(key)
    if key == "e" then
        IceSpikeEvent:FireServer()
		local projectile = game.ReplicatedStorage:WaitForChild('RemoteFunction'):InvokeServer()
        projectile.CFrame = CFrame.new(player.Character.UpperTorso.Position) --help
        projectile:FindFirstChild('BodyVelocity').Velocity = player.Character.UpperTorso.CFrame.lookVector * 150
    end
end)

Server Script:

---------[IceSpike]--------------------------------------------------
local IceSpikeEvent = game.ReplicatedStorage.MagicEvents.IceSpikeEvent
enabled = true

local remotefunction = Instance.new('RemoteFunction')
remotefunction.Parent = game.ReplicatedStorage
	

IceSpikeEvent.OnServerEvent:connect(function()
    if not enabled then return end
    local projectile = Instance.new("Part")
    projectile.Size = Vector3.new(2,11,2)
    projectile.BrickColor = BrickColor.new("Pastel Blue")
    projectile.CanCollide = false
    local projectileMesh= Instance.new("SpecialMesh", projectile)
    projectileMesh.MeshId = "rbxassetid://3508829528"
    projectileMesh.Scale = Vector3.new(1,0.8,1)
    local projectileEffect = Instance.new("Smoke", projectile)
    local projectileVelo = Instance.new("BodyVelocity", projectile)
	remotefunction.OnServerInvoke = function () return projectile end
    projectileVelo.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
    projectile.Parent = workspace
	
    game.Debris:AddItem(projectile, 1.5)
    enabled = false
    wait(2)
    enabled = true
end)

There you go, I hope I helped you :)