Sidisi, Regent of the Mire, Karmic Guide, Altar of Dementia, and Giant-Sized Flying Ant

Prerequisites

• Sidisi, Regent of the Mire on the battlefield
• Karmic Guide in the graveyard
• Altar of Dementia on the battlefield
• Giant-Sized Flying Ant on the battlefield

Steps

1. Activate Sidisi by tapping it and sacrificing Giant-Sized Flying Ant, returning Karmic Guide from your graveyard to the battlefield
2. When Karmic Guide enters the battlefield, it triggers, returning Giant-Sized Flying Ant from your graveyard to the battlefield
3. When Giant-Sized Flying Ant enters the battlefield, it triggers, untapping Sidisi
4. Activate Altar of Dementia by sacrificing Karmic Guide
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill