Doctor Fate

Doctor Fate, more accurately referred to as Nabu, is a Lord of Order, a supernatural entity and a superhero.

Early life
As a Lord of Order, Nabu had to rely on human hosts to have a presence on the physical plane. He could take over host bodies when they wear the Helmet of Fate, transforming them into Doctor Fate. While he is in control, the souls of his hosts remain within the Helmet, powerless to influence the outside world.

The most prominent host was Kent Nelson. He joined the Justice Society of America. Nelson's wife Inza convinced Kent to stop wearing the Helmet of Fate, and Nabu remained trapped in the Helmet for 65 years.

Present
Nabu gained a new human host when Wally West put on the Helmet in the fight against Klarion. They were evenly matched, but Fate won after he hurt Klarion's familiar Teekl, severing his ties with the mortal plane. Nabu at first refused to relinquish control of Wally's body. Kent Nelson, who had been mortally wounded, and sucked into the Helmet along with Wally when the young hero put it on, convinced Nabu that Wally was not the right suitor to be the next Doctor Fate. He would keep the Lord of Order company until a suitable successor was chosen. The Helmet of Fate would reside in Wally's room in Mount Justice for safekeeping.

Aqualad used the Helmet to fight against Wotan of the Injustice League. Kent once again convinced Nabu to relinquish the new host.

Zatanna used the Helmet to fight against Klarion. After she took him down, Nabu refused to give up her body, as he needed a permanent host to keep Klarion at bay. Zatara convinced Nabu to take him as a host instead of his daughter.

Known hosts

 * Kent Nelson (formerly)
 * Kid Flash (briefly)
 * Aqualad (briefly)
 * Zatanna (briefly)
 * Zatara (current)

Powers and abilities
Nabu's magical connection to the Helmet of Fate allows him to completely possess the body of the wearer. Once in control, he can utilize many mystical abilities including:
 * Flight
 * Energy blastsKid Doctor Fate.jpg
 * Magical constructs
 * Telepathy with his human host