Carrion Feeder, Feign Death, and Dualcaster Mage

Prerequisites

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

Steps

1. Cast Feign Death by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost
3. When Dualcaster Mage enters, it triggers, copying Feign Death, with the copy targeting Dualcaster Mage
4. Resolve the copy of Feign Death
5. Holding priority, activate Carrion Feeder by sacrificing Dualcaster Mage
6. When Dualcaster Mage dies, it triggers, returning it from your graveyard to the battlefield
7. Repeat from step 3
8. Resolve all Carrion Feeder abilities from step 5

Results

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