Magda, Brazen Outlaw, Leyline of Transformation, and Seeker of Skybreak

Prerequisites

• Magda, Brazen Outlaw on the battlefield
• Leyline of Transformation on the battlefield
• Seeker of Skybreak on the battlefield

Steps

1. Activate Seeker of Skybreak by tapping it, targeting itself
2. Magda triggers, creating a Treasure token
3. Resolve the Seeker of Skybreak ability, untapping it
4. Repeat

Results

• Infinite colored mana
• Infinite Treasure tokens
• Put all artifact cards and a subset of creature cards from your library onto the battleifeld