How can you create a combo with Dockside Extortionist, Underworld Breach, Grinding Station, Phyrexian Altar?
user
[START OF COMBO]This combo can be formed with Dockside Extortionist, Underworld Breach, Grinding Station, Phyrexian Altar

Color identity: R
Mana cost: {1}{R}
Steps:
  1. Cast Dockside Extortionist either from your hand by paying {1}{R} or from your graveyard for its escape cost by paying {1}{R} 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 {1}.
  6. Activate a Treasure by tapping and sacrificing it, adding {R}.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite self-mill
  - Near-infinite colored mana
  - Near-infinite death triggers
  - Near-infinite enters the battlefield
  - Near-infinite leaves the battlefield
  - Near-infinite mill
  - Near-infinite sacrifice triggers
  - Near-infinite storm count
  - Near-infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Dockside Extortionist must be in your hand or in the graveyard
  - Underworld Breach must be on the battlefield
  - Grinding Station must be on the battlefield
  - Phyrexian Altar must be 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.
[END OF COMBO PREREQUISITES]
assistant