Voltaic Construct, Axebane Guardian, and Ashnod's Transmogrant

Prerequisites

• Voltaic Construct on the battlefield
• Axebane Guardian on the battlefield
• Ashnod's Transmogrant on the battlefield

Steps

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

Results

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