Activate Fertilid by paying {1}{G} and removing a +1/+1 counter from it, causing you to search your library for a basic land card and put it on the battlefield untapped due to Spelunking.
When the basic land enters, Nissa and Roaring Earth trigger.
Resolve the Nissa trigger, adding {G}.
Resolve the Roaring Earth trigger, putting a +1/+1 counter on Fertilid.
Activate the basic land by tapping it, adding {1}.
Repeat.

Near-infinite landfall triggers

Put all basic lands from your library onto the battlefield tapped

Fertilid

Nissa, Resurgent Animist

Roaring Earth

Spelunking

Activate Ant Queen by paying {1}{G}, creating a creature token
Activate Earthcraft by tapping the creature token, untapping a basic Forest.
Activate the Forest by tapping it, adding {G}
Zendikar Resurgent triggers, adding {G}
Repeat

Infinite creature ETB

Infinite tapped creature tokens

Earthcraft

Ant Queen

Zendikar Resurgent

Activate Fertilid by paying {1}{G} and removing a +1/+1 counter from it, causing you to search your library for a basic land card and put it on the battlefield untapped due to Amulet of Vigor.
When the basic land enters, Amulet of Vigor, Nissa and Roaring Earth trigger.
Resolve the Amulet of Vigor trigger, untapping the basic land.
Resolve the Nissa trigger, adding {G}.
Resolve the Roaring Earth trigger, putting a +1/+1 counter on Fertilid.
Activate the basic land by tapping it, adding {1}.
Repeat.

Amulet of Vigor

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