Voltaic Construct + Karn, Silver Golem + Gilded Lotus

Prerequisites

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Steps

1. 1Animate Gilded Lotus using Karn.
2. 2Activate Gilded Lotus by tapping it, adding three mana of any color
3. 3Activate Voltaic Construct by paying , untapping Gilded Lotus.
4. 4Repeat from step 2.

Effects

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