Activate any number of other lands you control by tapping them, adding at least .
Activate
Lithatog's second ability by sacrificing a land other than
Port of Karfell, giving it +1/+1 until end of turn.
Repeat step 2 until you control no other lands except
Port of Karfell.
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.
Lumra enters the battlefield and dies as a state-based action due to having 0 toughness.
Lumra's enter-the-battlefield ability triggers, causing you to mill four cards and return all land cards from your graveyard to the battlefield tapped.
When the lands enter the battlefield,
Tiller Engine triggers that many times, untapping the lands.
Repeat.
Results
Infinite death triggers.
Infinite creature ETB.
Infinite landfall triggers.
Infinite creature LTB.
Infinitely large creature until end of turn.
Infinite mana lands you control can produce.
Infinite creature sacrifice triggers.
Infinite self-mill.
Put all land cards from your library and graveyard onto the battlefield.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
1
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5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.