Luminous Broodmoth, Corpse Knight, Downdraft, and Phyrexian Altar

Prerequisites

• Luminous Broodmoth on the battlefield
• Corpse Knight on the battlefield
• Downdraft on the battlefield
• Phyrexian Altar on the battlefield
• available

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. Luminous Broodmoth triggers, returning itself from your graveyard to the battlefield with a flying counter on it
4. Luminous Broodmoth enters the battlefield triggering Corpse Knight, causing each opponent to lose 1 life
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite lifeloss
• Infinite LTB
• Infinite sacrifice triggers