Gilder Bairn, Agatha of the Vile Cauldron, and Cryptolith Rite

Prerequisites

• Gilder Bairn on the battlefield
• Agatha of the Vile Cauldron on the battlefield
• Cryptolith Rite on the battlefield

Steps

1. Activate Gilder Bairn's ability from Cryptolith Rite by tapping it, adding
2. Activate Gilder Bairn by paying and untapping it, doubling each counter on target permanent
3. Repeat

Results

• Infinite proliferate for permanents