Dualcaster Mage, Emiel the Blessed, and Mana Geyser

Prerequisites

• Dualcaster Mage on the battlefield
• Emiel the Blessed on the battlefield
• Mana Geyser in hand
• undefined available

Steps

1. Cast Mana Geyser by paying , targeting an opponent with at least four cards in their hand
2. Holding priority, activate Emiel by paying , blinking Dualcaster Mage
3. Dualcaster Mage enters the battlefield, copying Mana Geyser
4. Resolve the copy of Mana Geyser, adding at least
5. Repeat from step 2

Results

• Infinite blinking
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite red mana