The African mystic Dr. Mist was the leader of the Global Guardians (see our profile on Impala). He was originally Nommo (later, "Maltis"), a sorceror from the ancient empire of Kor. He was basically a black Ibis, without the stick. In 1988, some lunatic writer decided to "reveal" that Dr. Mist had been carrying out a plan to breed a race of magic-wielding "Homo Magi" (*sigh*) to eventually produce his perfect bride-to-be. The result?
Oh, oh, my god, I think--I think I've ruptured something! Call Dr. Scott!! I-- I can't catch my breath! Blacking out-- going out like mi amor, Vibe... Paco, I'm coming to join you!
Anyway, Nommo actually adopted his Dr. Mist identity as means for *snort* traveling in Zatanna's circles. Dude-- "traveling in Zatanna's circles'' is pretty darned easy, as far as I can tell.
Don't worry, you didn't miss the wedding; Dr. M's little plan didn't go quite as he hoped; Nommo failed to get with Zatanna. Dude! How do you fail to get with Zatanna? Dale Gunn got with Zatanna. John Constantine got with Zatanna. The frickin' Yazz probably got with Zatanna. You're a loser, Dr. Mist .
He died in some battle, but that was only his physical form, you know. Magical crap. Came back again, renamed himself "Maltis", and founded Primal Force, which is probably the only punishment God could come up with worse than Hell (check out that link and look for some suprising gueststars). Primal Force killed him again, of course; it had the same effect on several readers.
Oh, and my theory on why Zee wouldn't get with Nommo? Well, let's just say there's a reason he went on to invent this.