Cultivator Colossus, Infinite Reflection, Enduring Renewal, Dryad Arbor, and Altar of Dementia

Prerequisites

• Cultivator Colossus on the battlefield
• Infinite Reflection on the battlefield
• Enduring Renewal on the battlefield
• Dryad Arbor in hand
• Altar of Dementia on the battlefield
• Infinite Reflection attached to Cultivator Colossus

Steps

1. Play Dryad Arbor from your hand
2. Dryad Arbor enters the battlefield as a copy of Cultivator Colossus due to Infinite Reflection
3. When Dryad Arbor enters the battlefield, it triggers
4. Holding priority, activate Altar of Dementia by sacrificing Dryad Arbor
5. When Dryad Arbor dies, Enduring Renewal triggers, returning Dryad Arbor to your hand
6. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Dryad Arbor's power
7. Resolve the Dryad Arbor trigger from step 3, causing you to put Dryad Arbor 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