How can you create a combo with Underworld Breach, Cabal Ritual, Ambassador Laquatus?
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[START OF COMBO]This combo can be formed with Underworld Breach, Cabal Ritual, Ambassador Laquatus

Color identity: UBR
Mana cost: {1}{B}
Steps:
  1. Cast Cabal Ritual from your graveyard for its escape cost by paying {1}{B} and exiling three other cards from your graveyard, adding {B}{B}{B}{B}{B}.
  2. Activate Ambassador Laquatus by paying {3}, causing you to mill three cards.
  3. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Underworld Breach must be on the battlefield
  - Cabal Ritual must be in the graveyard
  - Ambassador Laquatus must be on the battlefield
  - You have at least ten other cards in your graveyard.
[END OF COMBO PREREQUISITES]
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