God-Eternal Kefnet + Scroll Rack + Temporal Mastery

Mana needed: {4}{U}{U} each turn

U identity

Commander legal

The 3 combo pieces

How to execute it

  1. Tap Scroll Rack and pay {1} to activate it, putting Temporal Mastery on top of your library.
  2. Pass the turn.
  3. On your next draw step, when you draw Temporal Mastery, reveal it due to Kefnet's ability, making a copy that costs {2} less to cast.
  4. Cast the copy for {3}{U}{U}, granting you an extra turn.

What the combo produces