Tromell, Seymour's Butler, Crystalline Crawler, and Seedcradle Witch

Prerequisites

• Tromell, Seymour's Butler on the battlefield
• Crystalline Crawler on the battlefield
• Seedcradle Witch on the battlefield
• available

Steps

1. Activate Tromell by paying and tapping it, causing you to put at least five +1/+1 counters on Crystalline Crawler Activate Crystalline Crawler five times by removing five +1/+1 counters from it, adding
2. Activate Seedcradle Witch by paying , untapping Tromell and giving it +3/+3 until end of turn
3. Repeat

Results

• Infinite colored mana
• Infinite proliferate
• Infinite +1/+1 counters on a creature
• Infinitely large creature until end of turn
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce