Experiment Kraj, Gilder Bairn, and Leafkin Avenger

Prerequisites

• Experiment Kraj on the battlefield
• Gilder Bairn on the battlefield
• Leafkin Avenger on the battlefield

Steps

1. Activate Experiment Kraj using Leafkin Avenger's ability by tapping it, adding at least
2. Activate Experiment Kraj using Gilder Bairn's ability by paying and untapping it, doubling each counter on target permanent
3. Repeat

Results

• Infinite green mana
• Infinite proliferate