How can you create a combo with Kenrith, the Returned King, Dockside Extortionist, Altar of Dementia?
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[START OF COMBO]This combo can be formed with Kenrith, the Returned King, Dockside Extortionist, Altar of Dementia

Color identity: WUBRG
Mana cost: {1}{R}
Steps:
  1. Cast Dockside Extortionist.
  2. Dockside Extortionist enters, triggering to create six Treasure tokens.
  3. Sacrifice Dockside Extortionist to Altar of Dementia, milling target player 1.
  4. Activate Kenrith's last ability, returning Dockside Extortionist from your graveyard to the battlefield.
  5. Sacrifice five Treasures for {4}{B}.
  6. Repeat steps 2 to 5.[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 Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Kenrith, the Returned King must be on the battlefield
  - Dockside Extortionist must be in your hand
  - Altar of Dementia must be on the battlefield
  - Your opponents control six or more artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
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