Sigil of the New Dawn, Crystalline Crawler, Doubling Season, and Phyrexian Altar

Prerequisites

• Sigil of the New Dawn on the battlefield
• Crystalline Crawler in hand
• Doubling Season on the battlefield
• Phyrexian Altar on the battlefield
• in at least three different colors available

Steps

1. Cast Crystalline Crawler giving it six +1/+1 counters because of Doubling Season
2. Remove all six counters getting
3. Sacrifice Crawler to Altar for one mana of any color
4. Pay Sigil's cost of 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 of assorted colors containing at least
7. Repeat steps 4-7

Results

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