How can you create a combo with Ratchet, Field Medic // Ratchet, Rescue Racer, Mysterious Limousine, Sludge Strider, Krark-Clan Ironworks?
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[START OF COMBO]This combo can be formed with Ratchet, Field Medic // Ratchet, Rescue Racer, Mysterious Limousine, Sludge Strider, Krark-Clan Ironworks

Color identity: WUB
Mana cost: 
Steps:
  1. Activate Krark-Clan Ironworks by sacrificing Mysterious Limousine, adding {C}{C}.
  2. Sludge Strider triggers, causing you to pay {1} to gain 1 life and cause an opponent to lose 1 life.
  3. Ratchet, Field Medic triggers, converting it into Ratchet, Rescue Racer, and returning Mysterious Limousine from your graveyard to the battlefield.
  4. When Mysterious Limousine enters the battlefield, it and Sludge Strider trigger.
  5. Resolve the Mysterious Limousine trigger, exiling Ratchet until Mysterious Limousine leaves the battlefield.
  6. Resolve the Sludge Strider trigger, choosing not to pay.
  7. Activate Krark-Clan Ironworks by sacrificing Mysterious Limousine, adding {C}{C}.
  8. When Mysterious Limousine leaves the battlefield, Ratchet returns to the battlefield from exile as Ratchet, Field Medic.
  9. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite lifeloss
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Ratchet on the battlefield as Ratchet, Field Medic.
  - You have gained at least four life this turn.
[END OF COMBO PREREQUISITES]
assistant