Astral Cornucopia + Voltaic Construct + Xenic Poltergeist

B identity

Commander legal

The 3 combo pieces

• Astral Cornucopia
• Voltaic Construct
• Xenic Poltergeist

How to execute it

1. Animate Astral Cornucopia using Xenic Poltergeist.
2. Activate Astral Cornucopia by tapping it, adding at least three mana of any color
3. Activate Voltaic Construct by paying {2}, untapping Astral Cornucopia.
4. Repeat from step 2.

What the combo produces

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