Dualcaster Mage, Carrion Feeder, and Zombify

Prerequisites

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

Steps

1. Cast Zombify by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost
3. When Dualcaster Mage enters, it triggers, targeting Zombify
4. Holding priority, activate Carrion Feeder by sacrificing Dualcaster Mage, putting a +1/+1 counter on Carrion Feeder
5. Resolve the Dualcaster Mage trigger, copying Zombify Resolve the Zombify copy, returning Dualcaster Mage from your graveyard to the battlefield
6. Repeat from step 3

Results

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