Voltaic Construct + Tezzeret, Betrayer of Flesh + Everflowing Chalice

Voltaic Construct

Tezzeret, Betrayer of Flesh

Everflowing Chalice

How it works

1. Animate Everflowing Chalice using Tezzeret, Betrayer of Flesh.
2. Activate Everflowing Chalice by tapping it, adding at least CCC
3. Activate Voltaic Construct by paying 2, untapping Everflowing Chalice.
4. Repeat from step 2.

This clever loop relies on Tezzeret, Betrayer of Flesh to transform an ordinary Everflowing Chalice into an artifact creature with its −2 ability, while its passive cost-reduction makes activating Voltaic Construct completely free. With the mana cost waived, tapping the Chalice to produce three or more mana lets you pay the Construct's newly discounted untap ability and still come out ahead. By repeatedly untapping the Chalice, you can generate an endless supply of colorless mana to fuel the rest of your game plan.