How to make part go through baseplate?

So I made a script that creates a pillar that shoots up into the sky, the problem however. Is that I also need it to go through the baseplate, how can I do that using scripting?

Edit: Essentially, the script works like this: When I press a key, a pillar will spawn at your mouses position. However, when I press it anywhere near a player, it goes over said players head. I thought that by sinking it through the baseplate, that problem could be fixed. But I honestly don't know what to do and if anyone has any better ideas let me know.

Note: This is only on the receiving end of a remote, so not all variables will be stated, but you can probably guess based on what they are called and how they are used

game.ReplicatedStorage.FireTower.OnServerEvent:Connect(function(player,mousehit)
local char = game.Players[player.Name].Character
 local hum = char.Humanoid 
 local root = char.HumanoidRootPart


local fireTower = Instance.new("Part",workspace)
local fire = game:GetService("ServerStorage").Fire:Clone()
fire.Parent = fireTower
fireTower.Name = "fireTower"
fireTower.BrickColor = BrickColor.new("Deep orange")
fire.Size = NumberSequence.new(1)
fireTower.Shape = Enum.PartType.Cylinder
fireTower.CFrame = mousehit
fireTower.Size = Vector3.new(999,10,10)
fireTower.Orientation = Vector3.new(0, 0, 90)
fireTower.Material = Enum.Material.Neon
fireTower.Transparency = 0.5
fireTower.Anchored = true
fireTower.CanCollide = false
game.Debris:AddItem(fireTower, 6)
wait(3)
local tween = game:GetService("TweenService")
local tweenInfo = TweenInfo.new(1,Enum.EasingStyle.Quint,Enum.EasingDirection.In,0,false,0)
local tweenProperty = {Size = Vector3.new(999,20,20)}
local tweenRun = tween:Create(fireTower,tweenInfo,tweenProperty)
tweenRun:Play()
ten = true
fireTower.Touched:connect(function(hit)
 if not ten then return end
 ten = false
 local ehum = hit.Parent:findFirstChild("Humanoid") or hit.Parent.Parent:findFirstChild("Humanoid")
 if ehum and ehum ~= hum then
  ehum:TakeDamage(30)
local debrisService = game:GetService("Debris")
local fire = game:GetService("ServerStorage"):FindFirstChild("Fire")
    for _, v in pairs(hit.Parent:GetChildren()) do
        if v:IsA("BasePart") then 
            if not v:FindFirstChild("ParticleEmitter") then
                local fireClone = fire:Clone()
                fireClone.Parent = v
                debrisService:AddItem(fireClone, 5) -- removes the object in 5 seconds

end
end 
end
for i = 1, 10 do 
    hit.Parent.Humanoid:TakeDamage(3)
    wait(0.5)
end


ten = true
else 
  return nil
end
end)
end)