How can you create a combo with Underworld Breach, Lion's Eye Diamond, Brain Freeze?
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[START OF COMBO]This combo can be formed with Underworld Breach, Lion's Eye Diamond, Brain Freeze

Color identity: UR
Mana cost: 
Steps:
  1. Activate Lion's Eye Diamond by discarding your hand and sacrificing it, adding {U}{U}{U}.
  2. Cast Lion's Eye Diamond from your graveyard for its escape cost by exiling three cards besides Brain Freeze from your graveyard.
  3. Cast Brain Freeze from your graveyard for its escape cost by paying {1}{U} and exiling three cards from your graveyard.
  4. Brain Freeze's storm ability triggers, creating at least one copy of Brain Freeze targeting yourself, and any remaining copies targeting an opponent.
  5. Resolve each Brain Freeze, causing yourself to mill six cards and, if applicable, an opponent to mill three cards for each Brain Freeze remaining.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite self-mill
  - Near-infinite colored mana
  - Near-infinite magecraft triggers
  - Near-infinite mill
  - Near-infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Underworld Breach must be on the battlefield
  - Lion's Eye Diamond must be on the battlefield
  - Brain Freeze must be in the graveyard
  - You have at least six other cards in hand and/or graveyard.
[END OF COMBO PREREQUISITES]
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