This clever setup relies on *The Flesh Is Weak* to transform your creatures with +1/+1 counters into artifacts, neatly turning *Heronblade Elite* into an artifact creature. That crucial type-changing static ability allows *Voltaic Construct* to target and untap *Heronblade Elite* using the mana generated by its tap ability. As long as *Heronblade Elite* produces at least two mana per tap—a threshold easily achieved thanks to the initial +1/+1 counters granted by *The Flesh Is Weak*—you can cycle this loop indefinitely for infinite colored mana.