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

Color identity: WB
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing Karmic Guide.
  2. When Karmic Guide dies, Prowling Geistcatcher's first ability triggers, exiling Karmic Guide from your graveyard.
  3. Activate Altar of Dementia by sacrificing Prowling Geistcatcher.
  4. When Prowling Geistcatcher dies, its second ability triggers, returning Karmic Guide from exile to the battlefield.
  5. When Karmic Guide enters the battlefield, it triggers, returning Prowling Geistcatcher from your graveyard to the battlefield.
  6. Resolve the Altar of Dementia abilities from step 1 and step 3, causing target player to mill cards equal to Karmic Guide and Prowling Geistcatcher's power.
  7. Repeat.[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:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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