Voltaic Construct + Harabaz Druid + Thran Forge

Voltaic Construct

Harabaz Druid

Thran Forge

How it works

1. Cause Harabaz Druid to become an artifact using Thran Forge.
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 loop turns Harabaz Druid into an unstoppable mana engine by leveraging Thran Forge to permanently grant it the artifact type for the turn. With that single type change in place, Voltaic Construct can step in to repeatedly untap your newly minted artifact druid for just two generic mana. As long as Harabaz Druid is generating at least three mana per tap—fueled by a sufficient number of Allies—you will net positive mana on every single iteration of the loop, resulting in an infinite supply of colored mana.