How can you create a combo with Mythos of Illuna, Radiate, Codex Shredder?
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[START OF COMBO]This combo can be formed with Mythos of Illuna, Radiate, Codex Shredder

Color identity: GUR
Mana cost: {5}{U}{U}{R}{R}
Steps:
  1. Cast Mythos of Illuna by paying {2}{U}{U}, targeting anything but Codex Shredder.
  2. In response, cast Radiate by paying {3}{R}{R}, creating copies of Mythos of Illuna that target each permanent besides the original target.
  3. Resolve all copies of Mythos of Illuna, creating token copies of each permanent besides the original target.
  4. Activate the token copy of Codex Shredder by paying {5}, tapping it, and sacrificing it, returning Radiate from your graveyard to your hand.
  5. Activate the token lands or other mana-producing permanents created in step 3 by tapping them, adding at least {8}{R}{R}.
  6. Repeat from step 2, doubling the number of copies created in step 3 each repetition.[END OF COMBO STEPS]

Result:
  - Infinite copies of all permanents besides Codex Shredder
  - Infinite magecraft triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Mythos of Illuna must be in your hand
  - Radiate must be in your hand
  - Codex Shredder must be on the battlefield
  - There are permanents on the battlefield that enter the battlefield untapped and produce at least {8}{R}{R}.
[END OF COMBO PREREQUISITES]
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