Luminous Broodmoth + Zulaport Cutthroat + Downdraft + Phyrexian Altar

Luminous Broodmoth
Zulaport Cutthroat
Downdraft
Phyrexian Altar

Requires
Luminous Broodmoth must be on the battlefield. Zulaport Cutthroat must be on the battlefield. Downdraft must be on the battlefield. Phyrexian Altar must be on the battlefield. Mana needed:
Steps
  1. Activate Downdraft by paying , causing Luminous Broodmoth to lose flying until end of turn.
  2. Activate Phyrexian Altar by sacrificing Luminous Broodmoth, adding .
  3. Zulaport Cutthroat triggers, causing each opponent to lose 1 life and causing you to gain 1 life.
  4. Luminous Broodmoth triggers, returning itself from your graveyard to the battlefield with a flying counter on it.
  5. Repeat.
Results
Infinite death triggers. Infinite ETB. Infinite lifegain. Infinite lifegain triggers. Infinite lifeloss. Infinite LTB. Infinite sacrifice triggers.

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