God-Eternal Kefnet, Scroll Rack, and Temporal Mastery

Prerequisites

• God-Eternal Kefnet on the battlefield
• Scroll Rack on the battlefield
• Temporal Mastery in hand
• each turn available

Steps

1. Tap Scroll Rack and pay 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 less to cast
4. Cast the copy for , granting you an extra turn

Results

• Infinite turns
• Skip your draw step