Lumra, Bellow of the Woods + Springheart Nantuko + Nissa, Resurgent Animist + Coastal Hornclaw Combo

All permanents on the battlefield (Springheart Nantuko attached to Lumra on the battlefield).

You have at least two lands between the battlefield and your graveyard. You have a land card in hand. You are able to play a land this turn

available

Play any land.

When the land enters the battlefield, Springheart Nantuko triggers.

Holding priority, activate Coastal Hornclaw by sacrificing a land.

Repeat step 3 until you control no lands.

Resolve the Springheart Nantuko trigger, causing you to pay to create a token copy of Lumra.

Put the token Lumra into your graveyard due to the legend rule.

The Lumra token's enter-the-battlefield ability triggers, causing you to mill four cards and returning all lands from your graveyard to the battlefield.

When the lands enter the battlefield, Springheart Nantuko and Nissa trigger that many times.

Resolve all Nissa triggers, adding for each trigger.

Resolve all but one Springheart Nantuko trigger, choosing not to pay and creating that many 1/1 Insect creature tokens.

Repeat from step 3.

Infinite creature LTB

Infinite creature ETB

Infinite death triggers

Infinite self-mill

Infinite landfall triggers

Infinite mana lands you control can produce

Infinite colored mana

Put all lands from your library and graveyard onto the battlefield tapped

Infinite untap of lands you control