Yarok, the Desecrated + Fertilid + Crystalline Crawler + Avenger of Zendikar + Xenograft

Yarok, the Desecrated

Fertilid

Crystalline Crawler

Avenger of Zendikar

Xenograft

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 onto the battlefield tapped.
2. When the land enters the battlefield, Avenger of Zendikar's second ability triggers twice, putting two +1/+1 counters on each creature you control.
3. Activate Crystalline Crawler's first ability twice by removing two +1/+1 counters from it, adding 1.
4. Repeat.

This looping engine turns a steady stream of land drops into an escalating swarm of growth, perfectly orchestrated by Yarok, the Desecrated doubling every entry trigger in sight. Thanks to Xenograft declaring every creature an Elemental, Avenger of Zendikar's landfall ability doesn't just buff random tokens—it specifically pumps your entire board, including the counters needed to keep Fertilid and Crystalline Crawler in business. As you fetch basics and filter them through Crystalline Crawler's mana-producing counters, Yarok ensures the land-based value compounds exponentially until every basic land in your library rests safely on the battlefield.