How can you create a combo with Grenzo, Dungeon Warden, Soldevi Digger, Dockside Extortionist, Altar of Dementia?
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[START OF COMBO]This combo can be formed with Grenzo, Dungeon Warden, Soldevi Digger, Dockside Extortionist, Altar of Dementia

Color identity: BR
Mana cost: {4}
Steps:
  1. Activate Altar of Dementia by sacrificing Dockside Extortionist, causing target player to mill cards equal to Dockside Extortionist's power.
  2. Activate Soldevi Digger by paying {2}, putting Dockside Extortionist from your graveyard on the bottom of your library.
  3. Activate Grenzo by paying {2}, putting Dockside Extortionist from the bottom of your library into your graveyard, and then onto the battlefield.
  4. Dockside Extortionist enters the battlefield, creating at least four Treasure artifact tokens.
  5. Activate four Treasures by tapping and sacrificing them, adding {4}.
  6. Repeat.
  7. If opponents control at least five artifacts and/or enchantments, this combo nets infinite Treasure tokens and colored mana.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Opponents control at least four artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
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