How can you create a combo with Frantic Search, Underworld Breach, Bonus Round?
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[START OF COMBO]This combo can be formed with Frantic Search, Underworld Breach, Bonus Round

Color identity: UR
Mana cost: {2}{R}{R} at most
Steps:
  1. Cast Bonus Round either from your hand by paying {1}{R}{R} or from your graveyard for its escape cost by paying {1}{R}{R} and exiling three other cards from your graveyard, ensuring not to exile Frantic Search if its in your graveyard, causing any instant or sorcery cast this turn to be copied.
  2. Activate up to three lands by tapping them, adding at least {1}{U}.
  3. Cast Frantic Search either from your hand by paying {2}{U}, or from your graveyard for its escape cost by paying {2}{U} and exiling three other cards from your graveyard.
  4. Bonus Round triggers, copying Frantic Search.
  5. Resolve the copy of Frantic Search, causing you to loot twice and untap up to three lands.
  6. Holding priority, activate up to three lands by tapping them, adding at least {1}{U}.
  7. Resolve the original Frantic Search, causing you to loot twice and untap up to three lands.
  8. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite draw triggers
  - Infinite looting
  - Infinite self-discard triggers
  - Near-infinite magecraft triggers
  - Near-infinite mana lands you control can produce
  - Near-infinite untap of lands you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Frantic Search must be in your hand or in the graveyard
  - Underworld Breach must be on the battlefield
  - Bonus Round must be in your hand or in the graveyard
  - You have an additional six cards in your graveyard if both Bonus Round and Frantic Search are in your graveyard, or you have an additional three cards in your graveyard if either card is in your graveyard.
  - You control up to three lands that can tap to produce at least {1}{U}.
[END OF COMBO PREREQUISITES]
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