By bringing Mycosynth Lattice to the table, every permanent on the battlefield becomes an artifact—transforming Arbor Adherent into an artifact creature alongside its natural type. This clever reclassification allows the creature to be targeted by Voltaic Construct's ability, paying two generic mana to untap it each time. Because Arbor Adherent taps to produce enough mana to comfortably pay for the untap cost while leaving a surplus behind, you can loop this activation endlessly to generate infinite colored mana.