Lumra, Bellow of the Woods + Famished Worldsire + Eldrazi Confluence + Returned Pastcaller + Spelunking
Lumra, Bellow of the Woods
Famished Worldsire
Eldrazi Confluence
Returned Pastcaller
Spelunking
Infinite blinkingInfinite blinking of nonland permanentsInfinite card drawInfinite colorless manaInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite creature tokensInfinite death triggersInfinite draw triggersInfinite landfall triggersInfinite magecraft triggersInfinite mana lands you control can produceInfinite self-millInfinite storm countPut all land cards from your library and graveyard onto the battlefieldReduce the toughness of creatures opponents control to 0
How it works
Activate any number of lands by tapping them, adding at least 2.
Cast Eldrazi Confluence by paying 2, selecting its second mode three times, blinking Lumra, Returned Pastcaller and Famished Worldsire.
As Famished Worldsire enters, choose to sacrifice at least the lands tapped for mana in step 1, causing Famished Worldsire to then enter with three +1/+1 counters for each land sacrificed.
When Lumra, Returned Pastcaller and Famished Worldsire enter, they each trigger.
Resolve the Lumra trigger, causing you to mill four cards and return all land cards from your graveyard to the battlefield untapped due to Spelunking.
Resolve the Returned Pastcaller trigger, returning Eldrazi Confluence from your graveyard to your hand.
Resolve the Famished Worldsire trigger, causing you to look at some cards from the top of your library and put any land cards from among them onto the battlefield untapped due to Spelunking.