Voltaic Construct, Rise and Shine, and Grim Monolith

Prerequisites

• Voltaic Construct on the battlefield
• Rise and Shine in hand
• Grim Monolith on the battlefield
• available

Steps

1. Animate Grim Monolith using Rise and Shine
2. Activate Grim Monolith by tapping it, adding
3. Activate Voltaic Construct by paying , untapping Grim Monolith
4. Repeat from step 2

Results

• Infinite colorless mana
• Infinite mana artifacts you control can produce
• Infinite untap of artifacts you control