Voltaic Construct, The Blackstaff of Waterdeep, and Sceptre of Eternal Glory

Prerequisites

• Voltaic Construct on the battlefield
• The Blackstaff of Waterdeep on the battlefield
• Sceptre of Eternal Glory on the battlefield
• available

Steps

1. Animate Sceptre of Eternal Glory using The Blackstaff of Waterdeep
2. Activate Sceptre of Eternal Glory by tapping it, adding three mana of any color Activate Voltaic Construct by paying , untapping Sceptre of Eternal Glory
3. Repeat from step 2

Results

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