Opposition Agent, Hive Mind, Mana Severance, and Mind Grind

Prerequisites

• Opposition Agent on the battlefield
• Hive Mind on the battlefield
• Mana Severance in hand
• Mind Grind in hand
• available

Steps

1. Cast Mana Severance by paying
2. Hive Mind triggers, causing each opponent to create a copy of Mana Severance
3. Resolve each opponent's Mana Severance, searching their libraries for all land cards, exiling them and shuffling their library
4. Resolve your Mana Severance, exiling no lands cards from your library and shuffling your library
5. Cast Mind Grind by paying
6. Hive Mind triggers, causing each opponent to create a copy of Selective Memory
7. Resolve each opponent's Selective Memory, revealing the rest of each opponent's library then put those cards into their graveyard
8. Resolve your Selective Memory, revealing your cards until you reveal one land card from your library then puts all revealed cards to your graveyard

Results

• Mill an opponent library