Dualcaster Mage, and Doppelgang

Prerequisites

• Dualcaster Mage in hand
• Doppelgang in hand
• undefined available

Steps

1. Cast Doppelgang by paying , targeting a permanent
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters the battlefield, it triggers, copying Doppelgang, targeting Dualcaster Mage
4. Resolve the copy of Doppelgang, creating a token copy of Dualcaster Mage
5. Repeat from step 3

Results

• Infinite creature tokens
• Infinite ETB
• Infinite magecraft triggers
• Infinite landfall triggers
• Infinite copies of permanents on the battlefield