From ThresholdRPG Wiki

Idols of the gods have long been around. In the last century, finding such idols has become rather popular as returning them to their home temple and sacrificing them to the god in whose name the idol had been crafted is seen as proper respect. Some adventurers return the idols as gifts while others seek to make a profit, but most idols seem to find their way home.

Heretical Idols

Some idols have been crafted to honor beings outside of the Aether and are thus considered heretical. Often they are smashed, but there are those few who continue to honor these beings by sacrificing them in dark rituals outside the view of the religious population.