Trazyn the Infinite, Prismatic Geoscope, and Basalt Monolith

Prerequisites

• Trazyn the Infinite on the battlefield
• Prismatic Geoscope in the graveyard
• Basalt Monolith in the graveyard

Steps

1. Activate Trazyn using Prismatic Geoscope's ability by tapping it, adding at least four mana of any color
2. Activate Trazyn using Basalt Monolith's ability by paying , untapping Trazyn
3. Repeat

Results

• Infinite colored mana
• Infinite colorless mana