Vulturo, Prince of Darkness.Birdman's sinister foe Vulturo suddenly appears at an astronomic conference and threatens the whole assembly unless Birdman agrees to meet him in a duel that will match Birdman's superpowers against the awesome powers that Vulturo has devised. He even has a match for Avenger, a mechanical bird called Dirth. Fighting off each attack, Birdman's powers begin to fade; he flies evasively, but finds out that the lives of the scientists at the conference are under threat of a time-bomb. Given back some strength by a passing comet, Birdman rushes to the scientists, as Vulturo escapes.