Fertilid + Tireless Provisioner + Archelos, Lagoon Mystic + Thranduil's Company

Fertilid

Tireless Provisioner

Archelos, Lagoon Mystic

Thranduil's Company

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 Archelos.
2. When the basic land enters, Tireless Provisioner and Thranduil's Company trigger.
3. Resolve the Tireless Provisioner trigger, creating a Treasure token.
4. Resolve the Thranduil's Company trigger, putting two +1/+1 counters on Fertilid.
5. Activate the basic land by tapping it, adding 1.
6. Activate the Treasure by tapping and sacrificing it, adding .
7. Repeat.

This clever loop turns Fertilid's counter-removal ability into a self-sustaining engine by using the land it fetches to fuel the next activation. Tireless Provisioner supplies the missing green mana by dropping a Treasure token every time a land arrives, while Thranduil's Company keeps Fertilid continuously refueled with fresh +1/+1 counters after every landfall. Meanwhile, Archelos, Lagoon Mystic ensures the fetched lands enter untapped so they can be immediately tapped for the necessary generic mana to keep the cycle going.