Marvin, Murderous Mimic, Soliton, and Gyre Engineer

Prerequisites

• Marvin, Murderous Mimic on the battlefield
• Soliton on the battlefield
• Gyre Engineer on the battlefield
• Marvin does not have summoning sickness

Steps

1. Activate Marvin using Gyre Engineer's ability by tapping it, adding
2. Activate Marvin using Soliton's ability by paying , untapping it
3. Repeat

Results

• Infinite green mana