This clever loop turns your team's muscle into a self-sustaining mana engine by leaning on type manipulation. Thran Forge is the crucial enabler here, permanently turning Howlsquad Heavy into an artifact creature for the turn so it becomes a valid target for Voltaic Construct's untap ability. Once the Heavy is an artifact, you can tap it to exploit its Max speed ability, using the resulting red mana to pay for Voltaic Construct's untap cost with mana to spare. Because Howlsquad Heavy also grants your other Goblins haste and churns out tokens at the beginning of combat, you can easily channel this infinite red mana into closing out the game.