Snap, and Dualcaster Mage

Prerequisites

• Snap in hand
• Dualcaster Mage in hand
• available

Steps

1. Cast Snap by paying , targeting any creature
2. With the original Snap on the stack, cast Dualcaster Mage
3. Resolve the Dualcaster Mage ETB, causing you to create a copy of Snap and change its target to Dualcaster Mage
4. Resolve the copy of Snap, returning Dualcaster Mage to your hand and untapping two lands that produce enough to recast it
5. Repeat from step 2

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite magecraft triggers
• Infinite mana lands you control can produce
• Infinite storm count
• Infinite untap of lands you control