Marvin, Murderous Mimic, Farmstead Gleaner, and Metalworker

Prerequisites

• Marvin, Murderous Mimic on the battlefield
• Farmstead Gleaner on the battlefield
• Metalworker on the battlefield

Steps

1. Activate Marvin using Metalworker's ability by tapping it, revealing at least one artifact card from your hand and adding at least
2. Activate Marvin using Farmstead Gleaner's ability by paying and untapping it, putting a +1/+1 counter on Marvin
3. Repeat

Results

• Infinite colorless mana
• Infinite +1/+1 counters on a creature