Dualcaster Mage, Airbender's Reversal, and Heartless Summoning

Prerequisites

• Dualcaster Mage in hand
• Airbender's Reversal in hand
• Heartless Summoning on the battlefield
• available

Steps

1. Cast Airbender's Reversal by paying its mana cost, targeting any applicable target(s)
2. Holding priority, cast Dualcaster Mage by paying its mana cost reduced by Heartless Summoning
3. When Dualcaster Mage enters, it triggers, copying Airbender's Reversal targeting Dualcaster Mage
4. Resolve Airbender's Reversal, airbending Dualcaster Mage
5. Holding priority, cast Dualcaster Mage from exile by paying due to Heartless Summoning
6. Repeat from step 3

Results

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