Voltaic Construct, Incubation Druid, and Ashnod's Transmogrant

Prerequisites

• Voltaic Construct on the battlefield
• Incubation Druid on the battlefield
• Ashnod's Transmogrant on the battlefield

Steps

1. Cause Incubation Druid to become an artifact using Ashnod's Transmogrant
2. Activate Incubation Druid by tapping it, adding three mana of any type a land you control can produce Activate Voltaic Construct by paying , untapping Incubation Druid
3. Repeat from step 2

Results

• Infinite mana lands you control can produce
• Infinite untap of artifact creatures you control