Lumra, Bellow of the Woods + Mirrorpool + Spelunking + Troubled Healer

GW identity

Commander legal

The 4 combo pieces

• Lumra, Bellow of the Woods
• Mirrorpool
• Spelunking
• Troubled Healer

How to execute it

1. Activate any number of other lands by tapping them, adding at least {4}{C}.
2. Activate Troubled Healer 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 {4}{C}, 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.

What the combo produces

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