Voltaic Construct + Dreamstone Hedron + Ensoul Artifact

Voltaic Construct

Dreamstone Hedron

Ensoul Artifact

How it works

1. Activate Dreamstone Hedron by tapping it, adding CCC.
2. Activate Voltaic Construct by paying 2, untapping Dreamstone Hedron.
3. Repeat

By using Ensoul Artifact to turn Dreamstone Hedron into a 5/5 creature, we lay the foundation for a brilliant mechanical loop. Tapping Dreamstone Hedron yields three colorless mana, more than enough to fund the activation cost of Voltaic Construct, which untaps our newly minted artifact creature so the process can begin anew. This yields an infinite supply of colorless mana, which can later be funneled back into Dreamstone Hedron's sacrifice ability to draw your entire deck.