Reins of Power, and Sigil Tracer

Prerequisites

• Reins of Power in hand
• Sigil Tracer on the battlefield
• You control at least three additional Wizards
• Creatures you control can tap to produce at least
• available

Steps

1. Cast Reins of Power by paying
2. Holding priority, activate all mana-producing creatures you control by tapping them, adding at least
3. Activate Sigil Tracer twice by paying , tapping it and three other Wizards you control, copying Reins of Power twice
4. Resolve the first copy of Reins of Power, untapping all creatures you and target opponent control, and exchanging control of those creatures
5. Resolve the second copy of Reins of Power, untapping all creatures you and target opponent control, and exchanging control of those creatures, causing you to regain control of all the creatures you originally controlled
6. Repeat from step 2
7. If creatures you control can tap to produce at least , this combo nets infinite mana

Results

• Infinite magecraft triggers
• Infinite mana creatures you control can produce
• Infinite mana creatures you control can produce for target opponent
• Infinite untap of creatures you control