How can you create a combo with Opposition Agent, Hive Mind, Mana Severance, Mind Grind?
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[START OF COMBO]This combo can be formed with Opposition Agent, Hive Mind, Mana Severance, Mind Grind

Color identity: UB
Mana cost: {2}{U}{U}{B}
Steps:
  1. Cast Mana Severance by paying {1}{U}.
  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 {1}{U}{B}.
  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.[END OF COMBO STEPS]

Result:
  - Mill an opponent library[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Opposition Agent must be on the battlefield
  - Hive Mind must be on the battlefield
  - Mana Severance must be in your hand
  - Mind Grind must be in your hand
[END OF COMBO PREREQUISITES]
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