Dualcaster Mage, and Blue Sun's Twilight

Prerequisites

• Dualcaster Mage in hand
• Blue Sun's Twilight in hand
• undefined available

Steps

1. Cast Blue Sun's Twilight by paying , targeting a creature
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters the battlefield, it triggers, copying Blue Sun's Twilight, targeting Dualcaster Mage
4. Resolve the copy of Blue Sun's Twilight, creating a token copy of Dualcaster Mage
5. Repeat from step 3

Results

• Infinite creature tokens
• Infinite ETB
• Infinite magecraft triggers