Tazri, Stalwart Survivor, Gilder Bairn, and Zirda, the Dawnwaker

Prerequisites

• Tazri, Stalwart Survivor on the battlefield
• Gilder Bairn on the battlefield
• Zirda, the Dawnwaker on the battlefield
• Gilder Bairn does not have summoning sickness

Steps

1. Activate Gilder Bairn by tapping it, adding that can only be spent to activate abilities
2. Activate Gilder Bairn by paying and untapping it, doubling each counter on target permanent
3. Repeat

Results

• Infinite proliferate