Marvin, Murderous Mimic, Pili-Pala, and Sage of the Maze

Prerequisites

• Marvin, Murderous Mimic on the battlefield
• Pili-Pala on the battlefield
• Sage of the Maze on the battlefield
• Marvin does not have summoning sickness

Steps

1. Activate Marvin using Sage of the Maze's ability by tapping it, adding two mana of any color(s)
2. Activate Marvin using Pili-Pala's ability by paying and untapping it, adding one mana of any color
3. Repeat

Results

• Infinite colored mana