God-Eternal Kefnet + Jace, the Mind Sculptor + Temporal Trespass

God-Eternal Kefnet

Jace, the Mind Sculptor

Temporal Trespass

How it works

1. Activate Jace's zero loyalty ability, putting Temporal Trespass on top of your library.
2. Pass the turn.
3. On your next draw step, when you draw Temporal Trespass, reveal it due to Kefnet's ability, making a copy that costs 2 less to cast.
4. Cast the copy for 6, granting you an extra turn.