Well here I go again,hopefully I can find the time this time round to finnish.
This is a topic is open to plenty of interpritations and lots of great ideas.
I was thinking of doing a god figure-big ,mighty ,powerfull , plenty of authority being the main focus point.Maybe even radiating power , awesome power. There will be lots of human figures kneeling and bowing and praising him - they can be fearfull of him/her ,this master/god to them rules in teariny with harsh punishment but do reward loyalty with power.So there will be some leiutenants that he has rewarded closer by showing evidens of mutation caused by the power rewards to them.Normal humans that are to close to him is affected by his power eating away at them like cancer-could be part of there punishment for disloyalty.
He could be an alien or demon creature that crashed on the humans planet eons ago, this has beengoing on for a very long time.His ship or craft could be his temple now changed over time by him or the humans to suite his needs.His power could be coming from the temple/ship.
He can be standing on a raise platform with platforms lower down with his leuitenants and th human at the base.Maybe have the punished in cages closer to him slowly diying.
He could also demand human sacrevice for his amusemant - being a god/master could get boring over such a long time since e is not a real god.
This is just an idea so far and I might change some detailes along the way.
But this is a start so any coments are welcome.