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
• Market Festival attached to Morphling
• Morphling does not have summoning sickness

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