Underworld Breach, Lion's Eye Diamond, Brain Freeze, and Gamble

Prerequisites

• Underworld Breach on the battlefield
• Gamble in hand or graveyard
• All other cards in library
• At least three additional cards in graveyard, plus an additional three if Gamble is in your graveyard, plus an additional six in hand and/or graveyard
• available

Steps

1. Cast Gamble either from your hand by paying or from your graveyard for its escape cost by paying and exiling three cards from your graveyard
2. Resolve Gamble, searching your library for Lion's Eye Diamond, putting it into your hand, discarding a card at random, and shuffling your library
3. Cast Lion's Eye Diamond either from your hand by paying or from your graveyard for its escape cost by exiling three cards from your graveyard
4. Cast Gamble from your graveyard for its escape cost by paying and exiling three cards from your graveyard
5. Resolve Gamble, searching your library for Brain Freeze, putting it into your hand, discarding a card at random, and shuffling your library
6. Activate Lion's Eye Diamond by discarding your hand and sacrificing it, adding
7. Cast Brain Freeze from your graveyard for its escape cost by paying and exiling any three cards from your graveyard except Lion's Eye Diamond, targeting yourself
8. Brain Freeze's storm ability triggers, creating at least one copy of Brain Freeze targeting yourself and at least two copies of Brain Freeze targeting any player
9. Resolve each Brain Freeze, causing yourself to mill six cards and an opponent to mill three cards for each additional Brain Freeze copy
10. Cast Lion's Eye Diamond from your graveyard for its escape cost by exiling any three cards besides Brain Freeze from your graveyard
11. Repeat from step 6

Results

• Infinite self-mill
• Near-infinite colored mana
• Near-infinite storm count
• Near-infinite magecraft triggers
• Near-infinite mill