Lumra, Bellow of the Woods + Port of Karfell + Spelunking + Troubled Healer

GWUB identity

Commander legal

The 4 combo pieces

• Lumra, Bellow of the Woods
• Port of Karfell
• Spelunking
• Troubled Healer

What must be in place

Lands you control excluding Port of Karfell can tap to produce at least {3}{U}{B}{B}.
Archelos is untapped.

How to execute it

1. Activate any number of other lands you control by tapping them, adding at least {3}{U}{B}{B}.
2. Activate Troubled Healer by sacrificing a land other than Port of Karfell.
3. Repeat step 2 until you control no other lands except Port of Karfell.
4. Activate Port of Karfell's second ability by paying {3}{U}{B}{B}, tapping and sacrificing it, causing you to mill four cards and return Lumra from your graveyard to the battlefield tapped.
5. Lumra enters the battlefield and dies as a state-based action due to having 0 toughness.
6. Lumra's enter-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 creature LTB
• Infinite death triggers
• Infinite draw triggers
• Infinite ETB
• Infinite landfall triggers
• Infinite mana lands you control can produce
• Infinite sacrifice triggers
• Infinite self-mill
• Put all land cards from your library and graveyard onto the battlefield