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

Color identity: WB
Mana cost: {2}{B}
Steps:
  1. Cast Activated Sleeper by paying {2}{B}, choosing to have it enter the battlefield as a copy of Karmic Guide.
  2. Activated Sleeper enters the battlefield, targeting Karmic Guide.
  3. Holding priority, activate Altar of Dementia by sacrificing Activated Sleeper, causing target player to mill cards equal to Activated Sleeper's power.
  4. Resolve the Activated Sleeper trigger, returning Karmic Guide from your graveyard to the battlefield.
  5. Karmic Guide enters the battlefield, targeting Activated Sleeper.
  6. Holding priority, activate Altar of Dementia by sacrificing Karmic Guide, causing target player to mill cards equal to Karmic Guide's power.
  7. Resolve the Karmic Guide trigger, returning Activated Sleeper from your graveyard to the battlefield as a copy of Karmic Guide.
  8. Repeat from step 2.[END OF COMBO STEPS]

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

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