A council of four - The Flight Of Dragons

The 'Green Wizard' Carolinus discovers magic failing as humanity embraces science, and summons his brothers Lo Tae Zhao the Yellow Wizard; Solarius the Blue Wizard; and Ommadon the Red Wizard, before whom he resolves to create a 'Last Realm of Magic' hidden from the rest of the world. Lo Tae Zhao and Solarius consent, but Ommadon instead proposes to take control of the world himself; whereupon the other wizards decide to seize Ommadon's crown, the source of his powers.