Complex sentence: Hecate, for instance, was typically offered puppies at crossroadsa practice neither typical of an Olympian sacrifice nor of a chthonic sacrifice to Persephone or the heroesbut because of her underworld roles, Hecate is generally classed as chthonic.
Split into simpler sentences: Hecate, for instance, was typically offered puppies at crossroads--a practice neither typical of an Olympian sacrifice nor of a chthonic sacrifice to Persephone or the heroes. Because of her underworld roles, Hecate is generally classed as chthonic.