Experiment Kraj + Gilder Bairn + Marwyn, the Nurturer

GU identity

Commander legal

The 3 combo pieces

• Experiment Kraj
• Gilder Bairn
• Marwyn, the Nurturer

How to execute it

1. Activate Experiment Kraj using Marwyn's ability by tapping it, adding at least {G}{G}{G}{G}
2. Activate Experiment Kraj using Gilder Bairn's ability by paying {2}{G/U} and untapping it, doubling each counter on target permanent.
3. Repeat.

What the combo produces

• Infinite green mana
• Infinite proliferate