Lumra, Bellow of the Woods, Mirrorpool, Spelunking, and Need for Speed

Prerequisites

• Lumra, Bellow of the Woods on the battlefield
• Mirrorpool on the battlefield
• Spelunking on the battlefield
• Need for Speed on the battlefield

Steps

1. Activate any number of other lands by tapping them, adding at least
2. Activate Need for Speed by sacrificing a land except Mirrorpool
3. Repeat step 2 until you control no lands except Mirrorpool
4. Activate Mirrorpool's third ability by paying , tapping and sacrificing it, creating a token copy of Lumra
5. Put the Lumra token into your graveyard due to the legend rule
6. The Lumra token's enters-the-battlefield ability triggers, causing you to mill four cards and return all land cards from your graveyard to the battlefield untapped due to Spelunking
7. Repeat

Results

• Infinite ETB
• Infinite death triggers
• Infinite self-mill
• Infinite mana lands you control can produce
• Infinite landfall triggers
• Put all land cards from your library and graveyard onto the battlefield