From A Wiki of Ice and Fire
Moqorro Image by Robert O'Leary
|Title||Slave of R'hllor|
|Book(s)||A Dance with Dragons (Appears)|
- See also: Images of Moqorro
Moqorro's skin is black as pitch. He is over six feet tall, with a belly like a boulder. A tangle of pure white hair grows from his face like a mane of a lion, and red fire tattoos are inked across his cheeks and forehead. He wears scarlet robes with sleeves, collar, and hems embroidered with orange satin flames. He carries and iron staff as tall as he is, with a dragon's head that spits crackling green flame when brought down. He speaks the Common Tongue well, with only a hint of accent.
A Dance with Dragons
Like Melisandre, Moqorro can see the future in the flames, though his predictions are more accurate. He joins the crew of the ship Selaesori Qhoran heading to Qarth, although according to him he knew the ship would not reach Qarth but would lead him to Slaver's Bay. He wishes to see Daenerys Targaryen and when Jorah Mormont learns of this, he books passage on the ship so he can take his prisoner, Tyrion Lannister, to Daenarys. However, the ship is is ruined in a great storm which Moqorro knew was the real reason the ship would not reach Qarth, and he is lost overboard. 
Moqorro is discovered clinging to wreckage out to sea ten days later by the Iron Fleet commanded by Victarion Greyjoy. The crew wants him put to death, but Moqorro is unafraid and calm, which further unnerves the crew. Moqorro tells to Victarion he knows of the ironborn quest to seek the dragon queen and that Victarion will die from his wounded hand without Moqorro's help.
Using magic, Moqorro manages to cure Victarion's wound and to aid Victarion in his quest. He has Victarion kill the ship's maester, Kerwin, to bring good winds, just as Melisandre once did when she had Stannis Baratheon burn Alester Florent to grant his fleet favourable winds to Eastwatch.
Since Moqorro's red garb was ruined in the sea, Victarion has Tom Tidewood make Moqorro new robes from the black and gold of the Greyjoy sails. Victarion's crew live in great fear of Moqorro and among them he is known as the "Black Flame". This name is given to him by Steffar Stammerer, who cannot pronounce Moqorro's name properly.
|“||Dragons old and young, true and false, bright and dark. And you. A small man with a big shadow, snarling in the midst of it all.||”|