Voltaic Construct, Howlsquad Heavy, and Ashnod's Transmogrant

Prerequisites

• Voltaic Construct on the battlefield
• Howlsquad Heavy on the battlefield
• Ashnod's Transmogrant on the battlefield

Steps

1. Cause Howlsquad Heavy to become an artifact using Ashnod's Transmogrant
2. Activate Howlsquad Heavy by tapping it, adding at least
3. Activate Voltaic Construct by paying , untapping Howlsquad Heavy
4. Repeat from step 2

Results

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