Marvin, Murderous Mimic, Farmstead Gleaner, and Brigid, Clachan's Heart // Brigid, Doun's Mind

Prerequisites

• Marvin, Murderous Mimic on the battlefield
• Farmstead Gleaner on the battlefield
• Brigid, Clachan's Heart // Brigid, Doun's Mind on the battlefield

Steps

1. Activate Marvin using Brigid, Doun's Mind's ability by tapping it, adding at least or Activate Marvin using Farmstead Gleaner's ability by paying and untapping it, putting a +1/+1 counter on Marvin
2. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite green mana
• Infinite white mana