Color Identity: G

Initial Card State
- All permanents on the battlefield (Marvin without summoning sickness and with a +1/+1 counter on it).
Easy Prerequisites
- You control a land that can tap to produce [mana].
Steps
- Activate Marvin using Incubation Druid's ability by tapping it, adding three mana of any color.
- Activate Marvin using Farmstead Gleaner's ability by paying ({2} magic symbol)
and untapping it, putting a +1/+1 counter on Marvin. - Repeat.
Results
- Infinite mana lands you control can produce.
- Infinite +1/+1 counters on a creature.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).