Fertilid + Nissa, Resurgent Animist + Horizon Explorer + Beorn's Hospitality

Fertilid

Nissa, Resurgent Animist

Horizon Explorer

Beorn's Hospitality

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, Nissa and Beorn's Hospitality trigger.
3. Resolve the Nissa trigger, adding .
4. Resolve the Beorn's Hospitality trigger, putting a +1/+1 counter on Fertilid.
5. Activate the basic land by tapping it, adding 1.
6. Repeat.