Voltaic Construct + Prismatic Geoscope + Karn, Silver Golem

Voltaic Construct

Prismatic Geoscope

Karn, Silver Golem

How it works

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

By bringing Karn, Silver Golem to the table, we gain the ability to animate our noncreature artifacts into artifact creatures, turning Prismatic Geoscope into a legal target for its own mana-producing talents. Once the Geoscope is an artifact creature, its domain ability can tap to generate a surplus of mana, easily covering the activation cost required by Voltaic Construct to untap it. This creates a self-sustaining loop where Voltaic Construct endlessly resets Prismatic Geoscope, churning out infinite colored mana to fuel whatever grand transmutation you have planned next.