Dualcaster Mage, and Mythos of Illuna

Prerequisites

• Dualcaster Mage in hand
• Mythos of Illuna in hand
• You control at least one creature
• You have enough mana to cast Mythos of Illuna available

Steps

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

Results

• Infinite creature tokens
• Infinite ETB
• Infinite magecraft triggers