How can you create a combo with Scrap Mastery, Codex Shredder, Krark-Clan Ironworks?
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[START OF COMBO]This combo can be formed with Scrap Mastery, Codex Shredder, Krark-Clan Ironworks

Color identity: R
Mana cost: 
Steps:
  1. Activate any number of mana-producing artifacts you control by tapping them, adding at least {R}{R}.
  2. Activate Krark-Clan Ironworks by sacrificing any artifact except itself, adding {C}{C}.
  3. Repeat step 2 for each remaining applicable artifact.
  4. Activate Krark-Clan Ironworks by sacrificing itself, adding {C}{C}.
  5. Cast Scrap Mastery by paying {3}{R}{R}, causing each player to exile all artifact cards from your graveyard, then sacrifice all artifacts they control, then return all exiled cards from exile to the battlefield.
  6. Repeat steps 1-4 one additional time.
  7. Activate Codex Shredder's second ability by paying {5}, tapping and sacrificing it, returning Scrap Mastery from your graveyard to your hand.
  8. Repeat from step 5.
  9. If artifacts you control can tap to produce at least {1}{R}{R}, this combo nets infinite mana of those types.
  10. If you control four or more other nontoken artifacts as this combo begins, this combo nets infinite colorless mana.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite magecraft triggers
  - Infinite mana artifacts you control can produce
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Scrap Mastery must be in your hand
  - Codex Shredder must be in the graveyard
  - Krark-Clan Ironworks must be on the battlefield
  - You control any number of mana-producing artifact(s) that enter the battlefield untapped and that can tap to produce at least {R}{R}.
  - You control at least three additional nontoken artifacts, including the mana-producing artifact(s).
[END OF COMBO PREREQUISITES]
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