How can you create a combo with Vadrok, Apex of Thunder, Dockside Extortionist, Heat Shimmer, Snap?
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[START OF COMBO]This combo can be formed with Vadrok, Apex of Thunder, Dockside Extortionist, Heat Shimmer, Snap

Color identity: URW
Mana cost: {1}{W/U}{R}{R}, plus commander tax if applicable, plus one additional red, white, or blue mana if opponents control exactly three artifacts and/or enchantments
Steps:
  1. Cast Vadrok for its mutate cost by paying {1}{W/U}{R}{R}, merging it under Dockside Extortionist.
  2. The Dockside Extortionist mutated creature's ability from Vadrok triggers, casting Heat Shimmer from your graveyard without paying its mana cost.
  3. Resolve Heat Shimmer, creating a token copy of the Dockside Extortionist mutated creature with haste.
  4. The token copy of the Dockside Extortionist mutated creature triggers, creating at least three Treasure tokens.
  5. Activate three Treasure tokens by tapping and sacrificing them, adding {U}{R}{R}.
  6. Cast Snap by paying {1}{U}, returning the nontoken Dockside Extortionist and Vadrok from the battlefield to your hand and untapping two lands you control.
  7. Cast Vadrok for its mutate cost by paying {1}{W/U}{R}{R}, merging it under the token Dockside Extortionist mutated creature.
  8. The token Dockside Extortionist mutated creature triggers once for each of its Vadrok abilities.
  9. Resolve one of these triggers, casting Heat Shimmer from your graveyard without paying its mana cost.
  10. Resolve Heat Shimmer, creating a token copy of the Dockside Extortionist mutated creature with haste.
  11. The token copy of the Dockside Extortionist mutated creature triggers, creating at least three Treasure tokens.
  12. Activate three Treasure tokens by tapping and sacrificing them, adding {U}{R}{R}.
  13. Resolve a second trigger from step 8, casting Snap from your graveyard without paying its mana cost, targeting the mutated creature that includes the nontoken Vadrok.
  14. Resolve Snap, returning Vadrok from the battlefield to your hand as well as multiple token creatures which cease to exist, and untapping two lands you control.
  15. Resolve any remaining triggers from step 8, casting any noncreature cards with mana value 3 or less that were not already cast since step 8 from your graveyard without paying their casting costs.
  16. Repeat from step 7, adding one additional token Vadrok to each new iteration of the Dockside Extortionist mutated creature token.[END OF COMBO STEPS]

Result:
  - Infinite casts of all noncreature cards with mana value 3 or less in your graveyard
  - Infinite colored mana
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft
  - Infinite storm count
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Vadrok, Apex of Thunder must be in your hand or in the command zone
  - Dockside Extortionist must be on the battlefield
  - Heat Shimmer must be in the graveyard
  - Snap must be in your hand
  - Your opponents control at least three artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
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