Dualcaster Mage, Carrion Feeder, and Unearth

Prerequisites

• Dualcaster Mage in hand
• Carrion Feeder on the battlefield
• Unearth in hand
• available

Steps

1. Cast Unearth by paying , targeting any applicable target
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters, it triggers, targeting Unearth
4. Holding priority, activate Carrion Feeder by sacrificing Dualcaster Mage
5. Resolve the Dualcaster Mage trigger, copying Unearth, with the copy targeting Dualcaster Mage
6. Resolve the Unearth copy, returning Dualcaster Mage from your graveyard to the battlefield
7. Repeat from step 3

Results

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