Voltaic Construct + Ashnod's Transmogrant + Harabaz Druid

Voltaic Construct

Ashnod's Transmogrant

Harabaz Druid

How it works

1. Cause Harabaz Druid to become an artifact using Ashnod's Transmogrant.
2. Activate Harabaz Druid by tapping it, adding at least 3.
3. Activate Voltaic Construct by paying 2, untapping Harabaz Druid.
4. Repeat from step 2.

This clever little loop turns any ordinary Ally into a self-sustaining mana engine. It all hinges on Ashnod's Transmogrant, which permanently transforms Harabaz Druid into an artifact creature—a crucial type change that allows it to be targeted by Voltaic Construct's untap ability. Once the Druid can be repeatedly readied for just two mana, Harabaz Druid's own tap ability generates a surplus of mana every time you cycle through the loop, provided you control enough Allies to fuel the activation.