Dualcaster Mage, and Ember Island Production

Prerequisites

• Dualcaster Mage in hand
• Ember Island Production in hand
• available

Steps

1. Cast Ember Island Production by paying its mana cost, targeting a creature you control
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters the battlefield, it triggers, copying Ember Island Production, targeting Dualcaster Mage
4. Resolve the copy of Ember Island Production, creating a token copy of Dualcaster Mage
5. Repeat from step 3

Results

• Infinite ETB
• Infinite creature tokens
• Infinite magecraft triggers