Gilder Bairn, Agatha's Soul Cauldron, and Selvala, Heart of the Wilds

Prerequisites

• Gilder Bairn in exile
• Agatha's Soul Cauldron on the battlefield
• Selvala, Heart of the Wilds on the battlefield
• available

Steps

1. Activate Selvala by paying and tapping it, adding at least
2. Activate Selvala using Gilder Bairn's ability by paying and untapping it, doubling the counters on target permanent
3. Repeat

Results

• Infinite colored mana
• Infinite proliferate