Continue?, Dualcaster Mage, and Yahenni, Undying Partisan

Prerequisites

• Continue? in hand
• Dualcaster Mage in hand
• Yahenni, Undying Partisan on the battlefield
• available

Steps

1. Cast Continue? by paying its mana cost Holding priority, cast Dualcaster Mage by paying its mana cost
2. When Dualcaster Mage enters, it triggers, targeting Continue?
3. Holding priority, activate Yahenni by sacrificing Dualcaster Mage
4. Resolve the Dualcaster Mage trigger, copying Continue? Resolve the Continue? copy, returning Dualcaster Mage from your graveyard to the battlefield
5. Repeat from step 3

Results

• Infinite recursion of creatures you control
• Infinite death triggers
• Infinite magecraft triggers
• Infinite sacrifice triggers
• Infinite ETB
• Infinite LTB