The Phantom #10

Joe Gagnon finds diamonds at the floor of a huge statue of Tuamotu, giant god of the Itongo. Driven away, he finds startlingly-tall circus performer Idaho, whom he disguises as Tuamotu so as to gain access to the diamonds and lead raids on the neighbors, until the Phantom fights Idaho and easily vanquishes him. Idaho reveals that his very size makes him weak... it's exhausting even to walk. The crooks go to jail, the Itongo restore their loot, the fight becomes a legend, and the statue lies ignored.