Ivy, Gleeful Spellthief, Snap, Timeless Witness, Simic Growth Chamber, and Lotus Field

Prerequisites

• Ivy, Gleeful Spellthief on the battlefield
• Snap in hand
• Timeless Witness on the battlefield
• Simic Growth Chamber on the battlefield
• Lotus Field on the battlefield

Steps

1. Activate Simic Growth Chamber and Lotus Field by tapping them, adding
2. Cast Snap by paying , targeting Timeless Witness
3. Ivy triggers, copying Snap, targeting Ivy
4. Resolve the copy of Snap, returning Ivy from the battlefield to your hand and untapping Simic Growth Chamber and Lotus Field
5. Activate Simic Growth Chamber and Lotus Field by tapping them, adding and three mana of any color
6. Resolve Snap, returning Timeless Witness from the battlefield to your hand and untapping Simic Growth Chamber and Lotus Field
7. Cast Ivy by paying
8. Cast Timeless Witness by paying
9. When Timeless Witness enters the battlefield, it triggers, returning Snap from your graveyard to your hand
10. Repeat

Results

• Infinite colored mana
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite storm count
• Infinite untap of lands you control