Brain Freeze, Death Match, Dockside Extortionist, and Underworld Breach

Prerequisites

• Brain Freeze in hand or in your graveyard
• Death Match on the battlefield
• Dockside Extortionist in hand or in your graveyard
• Underworld Breach on the battlefield
• If Dockside Extortionist and/or Brain Freeze are in your graveyard, you have an additional three cards in your graveyard for each one
• Opponents control at least five artifacts and/or enchantments
• available

Steps

1. If Dockside Extortionist is in your hand, cast it by paying
2. Otherwise, cast it from your graveyard for its escape cost by paying and exiling any three cards from your graveyard except Brain Freeze
3. Dockside Extortionist enters the battlefield, triggering itself and Death Match
4. Resolve the Dockside Extortionist trigger, creating at least five Treasure tokens
5. Resolve the Death Match trigger, giving Dockside Extortionist -3/-3 until end of turn
6. Dockside Extortionist dies as a state-based action due to having zero or less toughness
7. Activate four Treasure tokens by tapping and sacrificing them, adding
8. If Brain Freeze is in your hand, cast it by paying
9. Otherwise, cast it from your graveyard for its escape cost by paying and exiling any three cards from your graveyard except Dockside Extortionist
10. Brain Freeze's storm ability triggers, creating a copy of Brain Freeze for each other spell you've cast this turn
11. Resolve the first two Brain Freezes, causing you to mill six cards
12. Resolve all remaining Brain Freezes, causing target player to mill three cards for each Brain Freeze
13. Repeat

Results

• Infinite self-mill
• Near-infinite colored mana
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite mill
• Near-infinite storm count
• Near-infinite Treasure tokens