Dualcaster Mage, Unearth, and Umbral Collar Zealot

Prerequisites

• Dualcaster Mage in hand
• Unearth in hand
• Umbral Collar Zealot on the battlefield
• available

Steps

1. Cast Unearth by paying , targeting any applicable target
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters, it triggers, targeting Unearth
4. Holding priority, activate Umbral Collar Zealot by sacrificing Dualcaster Mage
5. Resolve the Dualcaster Mage trigger, copying Unearth, with the copy targeting Dualcaster Mage
6. Resolve the Unearth copy, returning Dualcaster Mage from your graveyard to the battlefield
7. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers
• Infinite surveil 1