Altar of Dementia, Graceful Reprieve, and Naru Meha, Master Wizard

Prerequisites

• Altar of Dementia on the battlefield
• Graceful Reprieve in hand
• Naru Meha, Master Wizard in hand
• available

Steps

1. Cast Graceful Reprieve by paying its mana cost
2. Holding priority, cast Naru Meha by paying its mana cost
3. When Naru Meha enters, it triggers, copying Graceful Reprieve, with the copy targeting Naru Meha
4. Resolve the copy of Graceful Reprieve
5. Holding priority, activate Altar of Dementia by sacrificing Naru Meha
6. When Naru Meha dies, Graceful Reprieve triggers, returning Naru Meha from your graveyard to the battlefield
7. Repeat from step 3
8. Resolve all Altar of Dementia abilities from step 5

Results

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