Dockside Extortionist, Underworld Breach, Grinding Station, and Phyrexian Altar

Prerequisites

• Dockside Extortionist in hand or in the graveyard
• Underworld Breach on the battlefield
• Grinding Station on the battlefield
• Phyrexian Altar on the battlefield
• You have at least three additional cards in your graveyard if Dockside Extortionist is in your graveyard
• Opponents control at least three artifacts and/or enchantments
• available

Steps

1. Cast Dockside Extortionist either from your hand by paying or from your graveyard for its escape cost by paying and exiling three other cards from your graveyard
2. Dockside Extortionist enters the battlefield, creating at least three Treasure tokens
3. The Treasures enter the battlefield, triggering Grinding Station that many times, untapping Grinding Station
4. Activate Grinding Station by sacrificing a Treasure, causing you to mill three cards
5. Activate Phyrexian Altar by sacrificing Dockside Extortionist, adding
6. Activate a Treasure by tapping and sacrificing it, adding
7. Repeat

Results

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