Mischievous Quanar, and Turnabout

Prerequisites

• Mischievous Quanar on the battlefield
• Turnabout in hand
• Lands you control can tap to produce at least

Steps

1. Activate all lands you control by tapping them, adding at least
2. Cast Turnabout by paying
3. Holding priority, activate Mischievous Quanar's morph ability by paying , turning it face up
4. Mischievous Quanar triggers, copying Turnabout
5. Resolve the copy of Turnabout, untapping all lands you control
6. Activate all lands you control by tapping them, adding at least
7. Activate Mischievous Quanar by paying , turning it face down
8. Repeat from step 3

Results

• Infinite copies of any instants and/or sorceries on the stack
• Infinite magecraft triggers
• Infinite mana permanents you control can produce
• Infinite untap of permanents you control