Activate Jace's zero loyalty ability, putting Temporal Manipulation on top of your library.
Move to your next turn.
On your next draw step, when you draw Temporal Manipulation, reveal it due to Kefnet's ability, making a copy that costs ({2} magic symbol) less to cast.
Cast the copy for ({1} magic symbol) ({U} magic symbol) ({U} magic symbol) , granting you an extra turn.