Railway Brawler, Crystalline Crawler, and Meticulous Excavation

Prerequisites

• Railway Brawler on the battlefield
• Crystalline Crawler in hand
• Meticulous Excavation on the battlefield
• available in at least three different colors available

Steps

1. Cast Crystalline Crawler by paying , ensuring to spend at least three different colors of mana to cast it, causing Crystalline Crawler to enter the battlefield with at least three +1/+1 counters on it
2. When Crystalline Crawler enters the battlefield, Railway Brawler triggers, putting four +1/+1 counters on it
3. Activate Crystalline Crawler's first ability by removing all +1/+1 counters from it, adding and the remaining mana in any combination of color(s)
4. Activate Meticulous Excavation by paying , returning Crystalline Crawler to your hand from the battlefield
5. Repeat

Results

• Infinite colored mana
• Infinite ETB
• Infinite LTB
• Infinite storm count