Spawning Pit, Dualcaster Mage, and Generous Revival

Prerequisites

• Spawning Pit on the battlefield
• Dualcaster Mage in hand
• Generous Revival in hand
• available

Steps

1. Cast Generous Revival by paying its mana cost, targeting any applicable target
2. Holding priority, cast Dualcaster Mage by paying its mana cost
3. When Dualcaster Mage enters, it triggers, targeting Generous Revival
4. Holding priority, activate Spawning Pit by sacrificing Dualcaster Mage
5. Resolve the Dualcaster Mage trigger, copying Generous Revival, with the copy targeting Dualcaster Mage Resolve the Generous Revival copy, returning Dualcaster Mage from your graveyard to the battlefield
6. Repeat from step 3

Results

• Infinite charge counters on a permanent
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers