Marvin, Murderous Mimic, Simic Ragworm, and Sage of the Maze

Prerequisites

• Marvin, Murderous Mimic on the battlefield
• Simic Ragworm on the battlefield
• Sage of the Maze on the battlefield

Steps

1. Activate Marvin using Sage of the Maze's ability by tapping it, adding
2. Activate Marvin using Simic Ragworm's ability by paying , untapping it
3. Repeat

Results

• Infinite colored mana