Aluren, Unsubstantiate, and Dualcaster Mage

Prerequisites

• Aluren on the battlefield
• Unsubstantiate in hand
• Dualcaster Mage in hand
• available

Steps

1. Cast Unsubstantiate by paying its mana cost
2. Holding priority, cast Dualcaster Mage without paying its mana cost due to Aluren
3. When Dualcaster Mage enters, it triggers, copying Unsubstantiate, targeting Dualcaster Mage
4. Resolve the Unsubstantiate copy, returning Dualcaster Mage from the battlefield to your hand
5. Repeat from step 2

Results

• Infinite LTB
• Infinite ETB
• Infinite storm count
• Infinite magecraft triggers