Voltaic Construct, Katsumasa, the Animator, and Arc Reactor

Prerequisites

• Voltaic Construct on the battlefield
• Katsumasa, the Animator on the battlefield
• Arc Reactor on the battlefield
• available

Steps

1. Animate Arc Reactor using Katsumasa
2. Activate Arc Reactor by tapping it, adding Activate Voltaic Construct by paying , untapping Arc Reactor
3. Repeat from step 2

Results

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