Viscera Seer, Pain 101, and Dualcaster Mage

Prerequisites

• Viscera Seer on the battlefield
• Pain 101 in hand
• Dualcaster Mage in hand
• available

Steps

1. Cast Pain 101 by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost
3. When Dualcaster Mage enters, it triggers, copying Pain 101, with the copy targeting Dualcaster Mage
4. Resolve the copy of Pain 101
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 ETB
• Infinite LTB
• Infinite death triggers
• Infinite magecraft triggers
• Infinite sacrifice triggers
• Infinite scry 1