How can you create a combo with Sigil of the New Dawn, Phyrexian Altar, Su-Chi, Planar Gate?
user
[START OF COMBO]This combo can be formed with Sigil of the New Dawn, Phyrexian Altar, Su-Chi, Planar Gate

Color identity: W
Mana cost: 
Steps:
  1. Activate Phyrexian Altar by sacrificing Su-Chi, adding {W}.
  2. Su-Chi dies, triggering itself and Sigil of New Dawn.
  3. Resolve the Su-Chi trigger, adding {C}{C}{C}{C}.
  4. Resolve the Sigil of New Dawn trigger, causing you to pay {1}{W} to return Su-Chi from your graveyard to your hand.
  5. Cast Su-Chi by paying {1}.
  6. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant