Wheel of Sun and Moon + Phyrexian Altar + Earthcraft + Llanowar Sentinel

Wheel of Sun and Moon

Phyrexian Altar

Earthcraft

Llanowar Sentinel

How it works

1. Cast Llanowar Sentinel by paying 2.
2. Llanowar Sentinel enters the battlefield, triggering itself.
3. Holding priority, activate Earthcraft by tapping Llanowar Sentinel, untapping a basic land.
4. Activate the basic land by tapping it, adding 1.
5. Activate Phyrexian Altar by sacrificing Llanowar Sentinel, adding .
6. Llanowar Sentinel is put on the bottom of your library instead of your graveyard due to Wheel of Sun and Moon.
7. Resolve the Llanowar Sentinel trigger from step 2, causing you to pay 1 to search your library for Llanowar Sentinel and put it onto the battlefield.
8. Repeat from step 2.