Feign Death, Dualcaster Mage, and Carrion Feeder

Prerequisites

• Feign Death in hand
• Dualcaster Mage in hand
• Carrion Feeder on the battlefield
• available

Steps

1. Cast Feign Death by paying , targeting any creature
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters the battlefield, it triggers, creating a copy of Feign Death, targeting Dualcaster Mage
4. Resolve the copy of Feign Death
5. Activate Carrion Feeder by sacrificing Dualcaster Mage
6. When Dualcaster Mage dies, it triggers, returning itself from your graveyard to the battlefield tapped
7. Repeat from step 3
8. Resolve all Carrion Feeder abilities, putting infinite +1/+1 counters on it

Results

• Infinite +1/+1 counters
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite sacrifice triggers