Cultivator Colossus, Infinite Reflection, Enduring Renewal, Living Plane, and Altar of Dementia

Prerequisites

• Cultivator Colossus on the battlefield
• Infinite Reflection on the battlefield
• Enduring Renewal on the battlefield
• Living Plane on the battlefield
• Altar of Dementia on the battlefield
• You have at least one land card in hand
• Infinite Reflection attached to Cultivator Colossus

Steps

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 Altar of Dementia by sacrificing the land
5. When the land dies, Enduring Renewal triggers, returning the land to your hand from your graveyard
6. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the land's power
7. Resolve the land's trigger from step 3, causing you to put the land onto the battlefield from your hand, draw a card, and then decline to put another land onto the battlefield
8. Repeat from step 2

Results

• Infinite card draw
• Infinite draw triggers
• Infinite self-mill
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite mill
• Near-infinite sacrifice triggers