Lumra, Bellow of the Woods | Port of Karfell | Tiller Engine

(and one other card)

Lumra in your graveyard.
All other permanents on the battlefield.
Lands you control excluding
Port of Karfell can tap to produce at least ({3} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) .

Activate any number of other lands you control by tapping them, adding at least ({3} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) .
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 ({3} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) , 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.