How can you create a combo with Drivnod, Carnage Dominus, Scrap Trawler, Myr Retriever, Krark-Clan Ironworks?
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[START OF COMBO]This combo can be formed with Drivnod, Carnage Dominus, Scrap Trawler, Myr Retriever, Krark-Clan Ironworks

Color identity: B
Mana cost: 
Steps:
  1. Activate Krark-Clan Ironworks twice by sacrificing the nontoken artifact with mana value one or less and Myr Retriever, adding {C}{C}{C}{C}.
  2. When Myr Retriever dies, its ability triggers twice, returning Scrap Trawler and the nontoken artifact with mana one or less to your hand from your graveyard.
  3. Cast Scrap Trawler and the nontoken artifact by paying at most {4}.
  4. Activate Krark-Clan Ironworks twice by sacrificing the nontoken artifact and Scrap Trawler, adding {C}{C}{C}{C}.
  5. Scrap Trawler triggers twice for itself dying, and once for the nontoken artifact.
  6. Resolve the Scrap Trawler trigger for the nontoken artifact, returning any applicable artifact to your hand from your graveyard.
  7. Resolve the remaining Scrap Trawler triggers, returning the nontoken artifact and Myr Retriever to your hand from your graveyard.
  8. Cast the nontoken artifact and Myr Retriever by paying at most {3}.
  9. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Drivnod, Carnage Dominus must be on the battlefield
  - Scrap Trawler must be in the graveyard
  - Myr Retriever must be on the battlefield
  - Krark-Clan Ironworks must be on the battlefield
  - You control a nontoken artifact with mana value one or less that can be cast using only colorless mana.
[END OF COMBO PREREQUISITES]
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