Marvin, Murderous Mimic + Pili-Pala + Metalworker

Prerequisites

• You have at least one artifact card in hand.
• Marvin does not have summoning sickness.

Steps

1. 1Activate Marvin using Metalworker's ability by tapping it, revealing an artifact card from your hand and adding .
2. 2Activate Marvin using Pili-Pala's ability by paying and untapping it, adding one mana of any color.
3. 3Repeat.

Effects

• Infinite colored mana
• Infinite colorless mana