Fertilid + Tiller Engine + Tireless Provisioner + Bristly Bill, Spine Sower

Fertilid

Tiller Engine

Tireless Provisioner

Bristly Bill, Spine Sower

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 Tiller Engine.
2. When the basic land enters, Tiller Engine, Tireless Provisioner and Bristly Bill trigger.
3. Resolve the Tiller Engine 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 Bristly Bill trigger, putting a +1/+1 counter on Fertilid.
7. Activate the basic land by tapping it, adding 1.
8. Repeat.

This loop turns Fertilid’s activated ability into a self-sustaining engine by utilizing the passive support of your other permanents. You activate Fertilid by paying its cost and removing a counter, and while Tiller Engine untaps the resulting land to immediately refund your mana, Tireless Provisioner supplies the extra colored mana needed to keep the cycle going. Meanwhile, Bristly Bill, Spine Sower continuously replenishes Fertilid with fresh +1/+1 counters via landfall triggers, allowing you to pull every basic land straight out of your library and onto the battlefield.