Dualcaster Mage, and Multiversal Incursion

Prerequisites

• Dualcaster Mage in hand
• Multiversal Incursion in hand
• available

Steps

1. Cast Multiversal Incursion 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 Multiversal Incursion, targeting Dualcaster Mage
4. Resolve the copy of Multiversal Incursion, creating a token copy of Dualcaster Mage
5. Repeat from step 3

Results

• Infinite creature ETB
• Infinite creature tokens
• Infinite magecraft triggers
• Infinite copies of nontoken creatures you control