How can you create a combo with Fool's Demise, Peregrine Drake, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Fool's Demise, Peregrine Drake, Phyrexian Altar

Color identity: U
Mana cost: 
Steps:
  1. Activate up to five lands by tapping them, adding at least {3}{U}.
  2. Activate Phyrexian Altar by sacrificing Peregrine Drake, adding one mana of any color.
  3. Fool's Demise's first and second abilities trigger.
  4. Resolve the first Fool's Demise trigger, returning Peregrine Drake from your graveyard to the battlefield.
  5. When Peregrine Drake enters the battlefield, it triggers, untapping up to five lands.
  6. Resolve the second Fool's Demise trigger, returning Fool's Demise to your hand from your graveyard.
  7. Cast Fool's Demise by paying {4}{U}, targeting Peregrine Drake.
  8. Repeat.
  9. If the five lands can tap to produce at least {4}{U}, this combo nets infinite colored mana.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count
  - Infinite untap of lands you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Fool's Demise attached to Peregrine Drake.
  - You control up to five lands that can tap to produce at least {3}{U}.
[END OF COMBO PREREQUISITES]
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