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Color Identity: Blue, Black, Red

Prerequisites

  1. Professor Onyx on the battlefield
  2. Twincast and Fork in hand
  3. An additional instant or sorcery in hand with the mana available to cast it, or an opponent has cast an as of yet unresolved instant or sorcery spell
  4. (u magic symbol)   (u magic symbol)   (r magic symbol)   (r magic symbol)   available

Steps

  1. Cast your additional instant or sorcery spell, or wait for an opponent to cast one
  2. Professor Onyx triggers, losing each opponent two life and gaining you two life
  3. Cast Twincast targeting the instant or sorcery spell
  4. Professor Onyx triggers, losing each opponent two life and gaining you two life
  5. Cast Fork targeting Twincast
  6. Professor Onyx triggers, losing each opponent two life and gaining you two life
  7. Resolve Fork, copying Twincast and choosing Twincast as the target
  8. Professor Onyx triggers, losing each opponent two life and gaining you two life
  9. Resolve the copied Twincast, copying Twincast and choosing Twincast as the target
  10. Repeat from step 8

Results

  1. Infinite lifegain
  2. Infinite life loss