Dualcaster Mage, and Ephemerate

Prerequisites

• Dualcaster Mage in hand
• Ephemerate in hand
• available

Steps

1. Cast Ephemerate by paying , targeting any creature you control
2. Holding priority, cast Dualcaster Mage by paying
3. Dualcaster Mage enters the battlefield, creating a copy of Ephemerate targeting Dualcaster Mage
4. Resolve the copy of Ephemerate, blinking Dualcaster Mage
5. Repeat from step 3

Results

• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers