Cultivator Colossus + Infinite Reflection + Mortuary + Living Plane + Phyrexian Altar

Cultivator Colossus

Infinite Reflection

Mortuary

Living Plane

Phyrexian Altar

How it works

1. Play any land from your hand.
2. The land enters the battlefield as a copy of Cultivator Colossus due to Living Plane and Infinite Reflection.
3. When the land enters the battlefield, it triggers.
4. Holding priority, activate Phyrexian Altar by sacrificing the land, adding one mana of any color.
5. When the land dies, Mortuary triggers, putting the land on top of your library from your graveyard.
6. Resolve the land's trigger from step 3, causing you to put any other land onto the battlefield from your hand, draw a card, and then decline to put another land onto the battlefield.
7. Repeat from step 2.