Lumra, Bellow of the Woods, Port of Karfell, Archelos, Lagoon Mystic, and Trenching Steed

Prerequisites

• Lumra, Bellow of the Woods in the graveyard
• Port of Karfell on the battlefield
• Archelos, Lagoon Mystic on the battlefield
• Trenching Steed on the battlefield
• Lands you control excluding Port of Karfell can tap to produce at least
• Archelos is untapped

Steps

1. Activate any number of other lands you control by tapping them, adding at least
2. Activate Trenching Steed 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 , 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 Archelos
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite landfall triggers
• Infinite LTB
• 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