Voltaic Construct, The Blackstaff of Waterdeep, and Prismatic Geoscope

Prerequisites

• Voltaic Construct on the battlefield
• The Blackstaff of Waterdeep on the battlefield
• Prismatic Geoscope on the battlefield
• available

Steps

1. Animate Prismatic Geoscope using The Blackstaff of Waterdeep
2. Activate Prismatic Geoscope by tapping it, adding at least three mana of any color Activate Voltaic Construct by paying , untapping Prismatic Geoscope
3. Repeat from step 2

Results

• Infinite colored mana
• Infinite untap of artifact creatures you control