Dualcaster Mage, Afterlife from the Loam, and Yahenni, Undying Partisan

Prerequisites

• Dualcaster Mage in hand
• Afterlife from the Loam in hand
• Yahenni, Undying Partisan on the battlefield
• undefined plus enough mana and/or cards in your graveyard to cast Afterlife from the Loam available

Steps

1. Cast Afterlife from the Loam by paying at most
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters the battlefield, it triggers, targeting Afterlife from the Loam
4. Holding priority, activate Yahenni by sacrificing Dualcaster Mage
5. Resolve the Dualcaster Mage trigger, copying Afterlife from the Loam, targeting Dualcaster Mage and any other creature(s) as desired
6. Resolve the copy of Afterlife from the Loam, returning the targeted creatures from your graveyard to the battlefield
7. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers