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

Color identity: GU
Mana cost: {G}{G}
Steps:
  1. Cast Channel by paying {G}{G}.
  2. Activate Phyrexian Altar by sacrificing Webweaver Changeling, adding {U}.
  3. When Webweaver Changeling dies, Fool's Demise's first and second abilities trigger.
  4. Resolve the first Fool's Demise trigger, returning Webweaver Changeling from your graveyard to the battlefield.
  5. When Webweaver Changeling enters the battlefield, it triggers, causing you to gain 5 life.
  6. Resolve the second Fool's Demise trigger, returning it from your graveyard to your hand.
  7. Activate Channel four times by paying 4 life, adding {C}{C}{C}{C}.
  8. Cast Fool's Demise by paying {4}{U}, attaching it to Webweaver Changeling.
  9. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Fool's Demise must be on the battlefield
  - Channel must be in your hand
  - Phyrexian Altar must be on the battlefield
  - Webweaver Changeling must be on the battlefield
  - Fool's Demise attached to Webweaver Changeling.
  - You have three or more creature cards in your graveyard.
[END OF COMBO PREREQUISITES]
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