Fertilid + Amulet of Vigor + Tireless Provisioner + Roaring Earth

Fertilid

Amulet of Vigor

Tireless Provisioner

Roaring Earth

How it works

1. Activate Fertilid by paying 1 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.
2. When the basic land enters, Amulet of Vigor, Tireless Provisioner and Roaring Earth trigger.
3. Resolve the Amulet of Vigor trigger, untapping the basic land.
4. Resolve the Tireless Provisioner trigger, creating a Treasure token.
5. Activate the Treasure by tapping and sacrificing it, adding .
6. Resolve the Roaring Earth trigger, putting a +1/+1 counter on Fertilid.
7. Activate the basic land by tapping it, adding 1.
8. Repeat.

This looping engine puts every basic land from your library onto the battlefield by turning Fertilid's own counter-removal cost into a self-sustaining cycle. Whenever you pay to search for a land, Amulet of Vigor ensures it enters ready to tap for mana, while Tireless Provisioner generates a Treasure token to help fund the next activation. Meanwhile, Roaring Earth continually replaces the +1/+1 counters that Fertilid consumes, keeping the elemental well-fed and ready to search again.