Cogwork Assembler, Crystalline Crawler, Doubling Season, and Zameck Guildmage

Prerequisites

• Cogwork Assembler on the battlefield
• Crystalline Crawler in hand
• Doubling Season on the battlefield
• Zameck Guildmage on the battlefield
• available

Steps

1. Activate Zameck Guildmage's first ability twice by paying : this turn, each creature you control will enter the battlefield with four additional +1/+1 counters
2. Cast Crystalline Crawler by paying
3. Crystalline Crawler enters the battlefield with eight +1/+1 counters
4. Activate the first activated ability of any Crystalline Crawlers eight times by remove eight +1/+1 counters from them, adding eight mana of any color
5. Activate Cogwork Assembler by paying , creating two token copies of Crystalline Crawler, each with four +1/+1 counters and haste
6. Repeat from step 4 any number of times

Results

• Infinite +1/+1 counters
• Infinite card draw
• Infinite colored mana
• Infinite copies of artifacts
• Infinite creature tokens with haste
• Infinite ETB