Destroys either large moons or small moons causing planetary rings to form around the planet.

Either availble through a mission or the gp market.

Basicly, small moons having at least the opitunity to become a better effect ----> more reality transfusers bought! what is the problem with it?

Another possibility could be allowing a quasi spacial expanders to be used on the small moon changing it into large moons.

Maybe there is also an adverse effect which destroys random structures and doubles building costs for a week or something, to account for debris RAINING DOWN FROM THE HEAVENS.

This is why we have shields! to prevent the debrey from hitting us!