Dualcaster Mage, Trystan's Command, and Leyline of Transformation

Prerequisites

• Dualcaster Mage in hand
• Trystan's Command in hand
• Leyline of Transformation on the battlefield
• available

Steps

1. Cast Trystan's Command 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 Trystan's Command, targeting Dualcaster Mage
4. Resolve the copy of Trystan's Command, creating a token copy of Dualcaster Mage
5. Repeat from step 3

Results

• Destroy any number of creatures
• Infinite creature ETB
• Infinite creature tokens
• Infinite magecraft triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control
• Infinitely large creatures you control until end of turn
• Return all permanent cards from your graveyard to your hand