Toph, the First Metalbender, Battered Golem, and Bootleggers' Stash

Prerequisites

• Toph, the First Metalbender on the battlefield
• Battered Golem on the battlefield
• Bootleggers' Stash on the battlefield

Steps

1. Activate Battered Golem by tapping it, creating a Treasure token as Battered Golem is a land due to Toph
2. When the Treasure enters, Battered Golem triggers, untapping Battered Golem
3. Repeat

Results

• Infinite colored mana
• Infinite Treasure tokens