Ashaya, Soul of the Wild, Bootleggers' Stash, and Steelfin Whale

Prerequisites

• Ashaya, Soul of the Wild on the battlefield
• Bootleggers' Stash on the battlefield
• Steelfin Whale on the battlefield

Steps

1. Activate Steelfin Whale by tapping it, creating a Treasure token
2. The Treasure enters the battlefield, triggering Steelfin Whale, untapping Steelfin Whale
3. Repeat

Results

• Infinite colored mana
• Infinite Treasure tokens