Lumra, Bellow of the Woods | Famished Worldsire | Eldrazi Confluence (and two other cards)

Cards

Lands you control can tap to produce at least ({2} magic symbol) ({C} magic symbol) ({C} magic symbol) .

Activate any number of lands by tapping them, adding at least ({2} magic symbol) ({C} magic symbol) ({C} magic symbol) .
Cast
Eldrazi Confluence by paying ({2} magic symbol) ({C} magic symbol) ({C} magic symbol) , selecting its second mode three times, blinking
Lumra,
Greenwarden of Murasa 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,
Greenwarden of Murasa 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
Horizon Explorer.
Resolve the
Greenwarden of Murasa 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
Horizon Explorer.
Repeat.

If you can generate infinite ({C} magic symbol) once you have all the lands on the battlefield, you can forego blinking
Lumra and
Famished Worldsire, and instead elect to blink
Greenwarden of Murasa and choose any two other modes from
Eldrazi Confluence. This can allow you to blink other creatures, create infinite Eldrazi Spawn tokens and/or reduce any number of creatures' toughness to 0.

This combo has been estimated to be Exhibition (Bracket 1+).