Sigil of the New Dawn, Crystalline Crawler, Hardened Scales, Ashnod's Altar, and Pir, Imaginative Rascal

Prerequisites

• Sigil of the New Dawn on the battlefield
• Crystalline Crawler in hand
• Hardened Scales on the battlefield
• Ashnod's Altar on the battlefield
• Pir, Imaginative Rascal on the battlefield
• Doubling Season on the battlefield
• in at least three different colors available

Steps

1. Cast Crystalline Crawler giving it 5 +1/+1 counters because of Pir, Imaginative Rascal and harden scales
2. Remove all five counters getting
3. Sacrifice Crawler to Ashnod's for
4. Pay Sigil's cost of 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 of assorted colors containing
7. Repeat steps 4-7 adding mana along the way

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count