Body Launderer, Spark Double, Clever Impersonator, and Phyrexian Altar

Prerequisites

• Body Launderer on the battlefield
• Spark Double in the graveyard
• Clever Impersonator on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Clever Impersonator, adding one mana of any color
2. Clever Impersonator dies, triggering its second ability and Body Launderer's first ability
3. Resolve the Clever Impersonator trigger, returning Spark Double from your graveyard to the battlefield as a copy of Body Launderer
4. Resolve the Body Launderer trigger, causing it to connive
5. Activate Phyrexian Altar by sacrificing Spark Double, adding one mana of any color
6. Spark Double dies, triggering its second ability and Body Launderer's first ability
7. Resolve the Spark Double trigger, returning Clever Impersonator from your graveyard to the battlefield as a copy of Body Launderer
8. Resolve the Body Launderer trigger, causing it to connive
9. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite +1/+1 counters on Body Launderer
• Near-infinite colored mana
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite sacrifice triggers