Zaxara, the Exemplary, Patchwork Crawler, and Horseshoe Crab

Prerequisites

• Zaxara, the Exemplary in exile
• Patchwork Crawler on the battlefield
• Horseshoe Crab in exile
• Patchwork Crawler does not have summoning sickness

Steps

1. Activate Patchwork Crawler using Zaxara's ability by tapping it, adding
2. Activate Patchwork Crawler using Horseshoe Crab's ability by paying , untapping Patchwork Crawler
3. Repeat

Results

• Infinite colored mana