Voltaic Construct + Harabaz Druid + Encroaching Mycosynth

Voltaic Construct

Harabaz Druid

Encroaching Mycosynth

How it works

1. Activate Harabaz Druid by tapping it, adding at least 3.
2. Activate Voltaic Construct by paying 2, untapping Harabaz Druid.
3. Repeat

This brilliant engine turns a simple Ally into a powerhouse by leaning heavily on Encroaching Mycosynth, which transforms all your nonland permanents into artifacts. Because of this static type-change, Harabaz Druid is now considered an artifact creature alongside its Ally identity, making it a legal and willing target for Voltaic Construct. You simply tap the Druid for massive mana—fueled by the Allies you control—and use a fraction of those riches to pay the Construct's untap cost, clearing the way to repeat the loop indefinitely for infinite colored mana.