Dualcaster Mage, and Saw in Half

Prerequisites

• Dualcaster Mage in hand
• Saw in Half in hand
• available

Steps

1. Cast Saw in Half 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 Saw in Half, targeting Dualcaster Mage
4. Resolve the copy of Saw in Half, destroying Dualcaster Mage and creating two token copies of it with half its toughness and power, rounded up each time
5. Repeat from step 3

Results

• Infinite creature tokens
• Infinite ETB
• Infinite magecraft triggers