Dualcaster Mage, Echo Storm, and Mycosynth Lattice

Prerequisites

• Dualcaster Mage on the battlefield
• Echo Storm in hand
• Mycosynth Lattice on the battlefield
• You've cast your commander from the command zone at least once this game
• available

Steps

1. Cast Echo Storm by paying , targeting Dualcaster Mage
2. Echo Storm triggers, creating a copy of itself, targeting Dualcaster Mage
3. Resolve the copy of Echo Storm, creating a token copy of Dualcaster Mage
4. When the Dualcaster Mage token enters the battlefield, it triggers, creating a copy of Echo Storm, targeting Dualcaster Mage
5. Repeat from step 3

Results

• Infinite creature tokens
• Infinite ETB
• Infinite magecraft triggers