Well, I can tell you what you know:
Radiatos is the Cloud of Destruction, the Lord of the Wasteland.
"[...] And on the final night of the great war,
Radiatos, Cloud of Destruction, manifested in the great cities.
His wrath was absolute, his power without equal!
That night the ancients wept, for their lives were no more, their kin forfeit."
-Excerpt from the book of Radiatos.
The artifact of radiatos is 110 centimeters tall, 40 centimeters in diameter and looks like an upright bullet. It is encased in plastics and alloys of steel, orange and red colors.
The holy symbol of Radiatos:
The artifact is marked with two holy symbols of Radiatos, meaning it is a powerful artifact indeed. Anything covered by the symbol of Radiatos is an artifact or a holy place.
Radiatos is the God whose wrath laid the ancients' civilization in ruin. He is a vengeful god and his priests hold much power in some cities and tribes, but not in Bleak Wood where they are outlawed.