Ashnod's Altar + Crystalline Crawler + Hardened Scales + and 2 others

Mana needed: {4} in at least three different colors

GW identity

Commander legal

The 5 combo pieces

What must be in place

Doubling Season on the battlefield.

How to execute it

  1. Cast Crystalline Crawler giving it 5 +1/+1 counters because of Pir, Imaginative Rascal and harden scales.
  2. Remove all five counters getting {W} {U} {B} {R} {G}.
  3. Sacrifice Crawler to Ashnod's for {2}.
  4. Pay Sigil's cost of {1}{W} returning Crawler to hand.
  5. Recast Crystalline Crawler for all of the remaining floating mana giving it 6 +1/+1 counters.
  6. Remove all six counters netting {6} of assorted colors containing {W} {W} {U} {B} {R} {G}.
  7. Repeat steps 4-7 adding mana along the way.

What the combo produces