How can you create a combo with Sigil of the New Dawn, Crystalline Crawler, Doubling Season, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Sigil of the New Dawn, Crystalline Crawler, Doubling Season, Phyrexian Altar

Color identity: GW
Mana cost: {4} in at least three different colors
Steps:
  1. Cast Crystalline Crawler giving it six +1/+1 counters because of Doubling Season.
  2. Remove all six counters getting {W} {W} {U} {B} {R} {G}.
  3. Sacrifice Crawler to Altar for one mana of any color.
  4. Pay Sigil's cost of {1}{W} returning Crawler to hand.
  5. Recast Crystalline Crawler for all but one of the remaining floating mana giving it eight +1/+1 counters.
  6. Remove all eight counters netting {8} of assorted colors containing at least {W} {W} {U} {B} {R} {G}.
  7. Repeat steps 4-7.[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[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Sigil of the New Dawn must be on the battlefield
  - Crystalline Crawler must be in your hand
  - Doubling Season must be on the battlefield
  - Phyrexian Altar must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant