Dualcaster Mage, and Siren's Ruse

Prerequisites

• Dualcaster Mage in hand
• Siren's Ruse in hand
• You control at least one creature
• available

Steps

1. Cast Siren's Ruse 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 Siren's Ruse targeting Dualcaster Mage
4. Resolve the copy of Siren's Ruse, blinking Dualcaster Mage
5. Repeat from step 3

Results

• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers