Derevi, Empyrial Tactician, Preston, the Vanisher, and Panharmonicon

Prerequisites

• Derevi, Empyrial Tactician in the command zone
• Preston, the Vanisher on the battlefield
• Panharmonicon on the battlefield
• You control up to six permanents that can tap to produce at least

Steps

1. Activate up to six permanents by tapping them, adding at least
2. Activate Derevi by paying , putting it onto the battlefield from the command zone
3. When Derevi enters the battlefield, it and Preston trigger twice
4. Resolve both Derevi triggers, untapping up to two permanents
5. Resolve the first Preston trigger, creating a token copy of Derevi that is a 0/1 Illusion creature token
6. Put the nontoken Derevi into your graveyard due to the legend rule, and choose to return it to the command zone from your graveyard
7. When the Derevi token enters the battlefield, it triggers twice, untapping up to two permanents
8. Resolve the second Preston trigger, creating a token copy of Derevi that is a 0/1 Illusion creature token
9. Put either Derevi token into your graveyard due to the legend rule
10. When the Derevi token enters the battlefield, it triggers twice, untapping up to two permanents
11. Activate up to six permanents by tapping them, adding at least
12. Activate Derevi by paying , putting it onto the battlefield from the command zone
13. Put the remaining Derevi token into your graveyard due to the legend rule
14. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite death triggers
• Infinite mana permanents you control can produce
• Infinite untap of permanents you control