Kaya the Inexorable + Phyrexian Altar + Felidar Guardian + Earthcraft

Kaya the Inexorable

Phyrexian Altar

Felidar Guardian

Earthcraft

How it works

1. Activate Kaya's +1 loyalty ability to put a Ghostform Counter on Felidar Guardian.
2. Tap Felidar Guardian to untap your basic land.
3. Tap the basic land for .
4. Sacrifice Felidar Guardian to Phyrexian Altar for 1.
5. Felidar Guardian is returned to your hand, and you create a 1/1 Spirit creature token.
6. Tap the Spirit to untap your basic land.
7. Tap your basic land for 1 Sacrifice the Spirit for 1.
8. Cast Felidar Guardian.
9. When Felidar Guardian enters the battlefield, exile Kaya and return her to the battlefield.
10. Repeat.