With necromancy, they come as deceased relations, in dreams, sometimes they are real.
But sleight and animosity fill their hearts, Cravers of proclivity are likeliest to drown in their artificial words.
They came to carry out their mistresses will, her annual necromantic rite, where familiar spirits in selected parts of the world are conjured. They would tell the kings about the golden city in their dreams, that it is unbeknownst to none but few who had no map or something that could convey them over the oceans to the golden city, 

Affirmative, the land does exist.

The destinies of a visitant is coming and going, but none but one, who has stepped foot on the shores of the golden city (eastern Amazon), has ever made it home.
Only Van-markus and his crew of dutch pirates has.
Five Empires drowned in those words about the golden city.. The Japanese Empire, The British Empire, The Roman Empire, The Igbo's. they all journeyed to the golden city unbeknown of the evil that awaits them there.