If you're going to age and bang up the altar the floor and columns have to match that level of decay or it'll look weird. So here comes my long winded list of observations <3

The sword is glowing but isn't affecting the environment, a weak, warm point light with falloff would help I think.

Maybe try a different shape on the spotlight, like the light is coming from a crack in the ceiling or something, anything but the default circular shape, it makes it look like its part of a tourist trap.

The shadowing on the altar is very hard, try increasing the light angle for softer shadows, and you may have to increase the light rays to get rid of the grain. Also the shadows are pitch black, a couple of little weak area lights with fall off to create bounce light would help.