How can you create a combo with Sigil of the New Dawn, Deathrender, Altar of Dementia, Cloud of Faeries?
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[START OF COMBO]This combo can be formed with Sigil of the New Dawn, Deathrender, Altar of Dementia, Cloud of Faeries

Color identity: WU
Mana cost: {1}{W}
Steps:
  1. Activate Altar of Dementia by sacrificing Cloud of Faeries.
  2. Sigil of the New Dawn and Deathrender trigger.
  3. Resolve Sigil of the New Dawn's trigger, paying {1}{W} to return Cloud of Faeries from your graveyard to your hand.
  4. Resolve Deathrender's trigger, putting Cloud of Faeries from your hand onto the battlefield and attaching Deathrender to it.
  5. Cloud of Faeries enters the battlefield, triggering itself, untapping two lands you control that can produce {1}{W}.
  6. Resolve the Altar of Dementia ability from step 1, causing target player to mill three cards.
  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
  - Deathrender attached to Cloud of Faeries.
  - You control lands that produce at least {1}{W}.
[END OF COMBO PREREQUISITES]
assistant