Fertilid + Tireless Provisioner + Spelunking + Obuun, Mul Daya Ancestor

Fertilid

Tireless Provisioner

Spelunking

Obuun, Mul Daya Ancestor

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 Spelunking.
2. When the basic land enters, Tireless Provisioner and Obuun trigger.
3. Resolve the Tireless Provisioner trigger, creating a Treasure token.
4. Activate the Treasure by tapping and sacrificing it, adding .
5. Resolve the Obuun trigger, putting a +1/+1 counter on Fertilid.
6. Activate the basic land by tapping it, adding 1.
7. Repeat.