The Kingdom Come

Loukios was a combat chemist who worked making poisons and medicines for the army
Soon after an old discovery from his childhood, he started to become a powerful alchemist who yearned to harvest the powers of a God while bringing humanity new qualities of life through his science; all was well in Rome; the Emporer Koor prospered as Loukios worked in the dark. Until the Catholics invaded. Their new ruler, Belial, the mouth of God or, as those in hiding called him, Belial the false prophet.
The Catholic rule was underway, and many converted to save themselves and those who'd resist being slain or hung. When the god elixir was created. Looks went running, alchemists and men of science were high targets as they were deemed users of "Satan's black magic" or "blasphemous heathen" Witness the story of Loukios attempting to complete the God Elixir before Belial could attain it and rule Rome and any more lands to come