Enduring Renewal, Crystalline Crawler, and Phyrexian Altar

Prerequisites

• Enduring Renewal on the battlefield
• Crystalline Crawler in hand
• Phyrexian Altar on the battlefield
• in four different colors available

Steps

1. Cast Crystalline Crawler by paying in four different colors, causing Crystalline Crawler to enter the battlefield with four +1/+1 counters on it
2. Activate Crystalline Crawler's first ability four times by removing four +1/+1 counters from it, adding in four different colors
3. Activate Phyrexian Altar by sacrificing Crystalline Crawler, adding one mana of any color
4. When Crystalline Crawler dies, Enduring Renewal triggers, returning Crystalline Crawler from your graveyard to your hand
5. Repeat

Results

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