Viscera Seer, Presumed Dead, and Dualcaster Mage

Prerequisites

• Viscera Seer on the battlefield
• Presumed Dead in hand
• Dualcaster Mage in hand
• available

Steps

1. Cast Presumed Dead by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost
3. When Dualcaster Mage enters, it triggers, copying Presumed Dead, with the copy targeting Dualcaster Mage
4. Resolve the copy of Presumed Dead
5. Holding priority, activate Viscera Seer by sacrificing Dualcaster Mage
6. When Dualcaster Mage dies, it triggers, returning it from your graveyard to the battlefield
7. Repeat from step 3
8. Resolve all Viscera Seer abilities from step 5

Results

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