Gilder Bairn, Biomancer's Familiar, and Enduring Vitality

Prerequisites

• Gilder Bairn on the battlefield
• Biomancer's Familiar on the battlefield
• Enduring Vitality on the battlefield

Steps

1. Activate Gilder Bairn's ability from Enduring Vitality 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