Marvin, Murderous Mimic, Pili-Pala, and Alena, Kessig Trapper

Prerequisites

• Marvin, Murderous Mimic on the battlefield
• Pili-Pala on the battlefield
• Alena, Kessig Trapper on the battlefield
• You had a creature with power 2 or greater enter the battlefield this turn
• Marvin does not have summoning sickness

Steps

1. Activate Marvin using Alena's ability by tapping it, adding at least
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