Fertilid + Lotus Cobra + Horizon Explorer + Thranduil's Company

Fertilid

Lotus Cobra

Horizon Explorer

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 Horizon Explorer.
2. When the basic land enters, Lotus Cobra and Thranduil's Company trigger.
3. Resolve the Lotus Cobra trigger, adding .
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. Repeat.

This engine uses Fertilid as a repeatable land tutor, funding its own activation costs through the mana generated by Lotus Cobra whenever a land enters. Horizon Explorer ensures those searched lands drop untapped immediately, while Thranduil's Company provides the crucial source of +1/+1 counters to replenish Fertilid after each activation—turning every iteration into a net-positive loop that empties your library of basics.