Ashaya, Soul of the Wild, Market Festival, and Morphling

Prerequisites

• Ashaya, Soul of the Wild on the battlefield
• Market Festival on the battlefield
• Morphling on the battlefield

Steps

1. Activate Morphling by tapping it, adding
2. Market Festival triggers, adding and one mana of any color
3. Activate Morphling's first ability by paying , untapping it
4. Repeat

Results

• Infinite colored mana