Sigil Tracer, and Turnabout

Prerequisites

• Sigil Tracer on the battlefield
• Turnabout in hand
• at most available

Steps

1. Activate number of lands by tapping them, adding at least
2. Cast Turnabout by paying
3. Activate Sigil Tracer by paying and tapping two Wizards you control, copying Turnabout
4. Resolve the Turnabout copy, untapping all lands you control
5. Holding priority, activate number of lands by tapping them, adding at least
6. Activate Sigil Tracer by paying and tapping two Wizards you control, copying Turnabout
7. Resolve the Turnabout copy, untapping all creatures you control

Results

• Infinite magecraft triggers
• Infinite mana permanents you control can produce