How can you create a combo with Activated Sleeper, Karmic Guide, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Activated Sleeper, Karmic Guide, Phyrexian Altar

Color identity: WB
Mana cost: {2}
Steps:
  1. Activate Phyrexian Altar by sacrificing Karmic Guide, adding {B}.
  2. Cast Activated Sleeper by paying {2}{B}, choosing to have it enter the battlefield as a copy of Karmic Guide.
  3. Activated Sleeper enters the battlefield, targeting Karmic Guide.
  4. Holding priority, activate Phyrexian Altar by sacrificing Activated Sleeper, adding one mana of any color.
  5. Resolve the Activated Sleeper trigger, returning Karmic Guide from your graveyard to the battlefield.
  6. Karmic Guide enters the battlefield, targeting Activated Sleeper.
  7. Holding priority, activate Phyrexian Altar by sacrificing Karmic Guide, adding one mana of any color.
  8. Resolve the Karmic Guide trigger, returning Activated Sleeper from your graveyard to the battlefield as a copy of Karmic Guide.
  9. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Activated Sleeper must be in your hand
  - Karmic Guide must be on the battlefield
  - Phyrexian Altar must be on the battlefield
[END OF COMBO PREREQUISITES]
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