Voltaic Construct + Circle of Dreams Druid + Thran Forge

Voltaic Construct

Circle of Dreams Druid

Thran Forge

How it works

1. Cause Circle of Dreams Druid to become an artifact using Thran Forge.
2. Activate Circle of Dreams Druid by tapping it, adding at least .
3. Activate Voltaic Construct by paying 2, untapping Circle of Dreams Druid.
4. Repeat from step 2.

By utilizing Thran Forge, you fundamentally rewrite the nature of your Circle of Dreams Druid by turning it into an artifact in addition to its other types. This transformation allows Voltaic Construct to target and untap the Druid using its mana ability. As long as you control enough creatures to generate more than two green mana per tap, the loop pays for itself entirely, giving you infinite green mana and infinite untaps of your artifact creatures.