How can you create a combo with Body Launderer, Spark Double, Clever Impersonator, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Body Launderer, Spark Double, Clever Impersonator, Ashnod's Altar

Color identity: UB
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Clever Impersonator, adding {C}{C}.
  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 Ashnod's Altar by sacrificing Spark Double, adding {C}{C}.
  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.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Infinite draw triggers
  - Near-infinite +1/+1 counters on Body Launderer
  - Near-infinite colorless mana
  - Near-infinite death triggers
  - Near-infinite enters the battlefield
  - Near-infinite leaves the battlefield
  - Near-infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Body Launderer must be on the battlefield
  - Spark Double must be in the graveyard
  - Clever Impersonator must be on the battlefield
  - Ashnod's Altar must be on the battlefield
[END OF COMBO PREREQUISITES]
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