How can you create a combo with Codie, Vociferous Codex, Necrotic Ooze, Torchling?
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[START OF COMBO]This combo can be formed with Codie, Vociferous Codex, Necrotic Ooze, Torchling

Color identity: WUBRG
Mana cost: {4}, plus enough mana to pay for the nonland card's mana cost minus {W}{U}{B}{R}{G}
Steps:
  1. Activate Necrotic Ooze using Codie's ability by paying {4} and tapping it, adding {W}{U}{B}{R}{G}.
  2. Activate Necrotic Ooze using Torchling's first ability by paying {R}, untapping Necrotic Ooze.
  3. Repeat as desired, skipping step 2 on the final iteration.
  4. Cast any spell by paying its mana cost, reduced by the {W}{U}{B}{R}{G} added in step 1.
  5. Necrotic Ooze triggers for each time you activated Codie's ability.
  6. Resolve the first trigger, causing you to exile cards from the top of your library until you exile an instant or sorcery spell with lesser mana value, and allowing you to cast that spell without paying its mana cost.
  7. Repeat step 6 for each remaining trigger.
  8. You may also repeat this combo for each nonland card in your hand as mana permits, and on subsequent turns.[END OF COMBO STEPS]

Result:
  - Cast all instants and sorceries in your library with mana value less than spells you cast[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Codie, Vociferous Codex must be in the graveyard
  - Necrotic Ooze must be on the battlefield
  - Torchling must be in the graveyard
  - Necrotic Ooze does not have summoning sickness.
  - You have at least one nonland card in hand.
[END OF COMBO PREREQUISITES]
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