LookVector is not a valid member of Vector3?

local replicatedstorage = game:GetService("ReplicatedStorage")
local runservice = game:GetService("RunService")

replicatedstorage.Events.pinkPower2.OnServerEvent:Connect(function(player, mousePos)

    local character = player.Character

    local pinkpower21 = game.ReplicatedStorage.Effects.PinkPower21:Clone()
    pinkpower21.Parent = workspace.ignored

    pinkpower21.Position = character.LeftHand.position

    local connection
    connection = runservice.Heartbeat:Connect(function(dt)
        pinkpower21.CFrame = CFrame.new(pinkpower21.Position) + mousePos.LookVector <- where the error is
    end)
end)