In this panel we have Inza being attacked by a man under Wotan's mind control. She screams out for Dr. Fate. However, before we see the actual character we see a dark cloud appear and get to "hear" his voice for the first time.
From that cloud Dr. Fate emerges to rescue both Inza and the brainwashed attacker. I love this first appearance because the set up is so cinematic. I can totally see this happening on a movie screen.
And finally we get Dr. Fate's official introduction.