It gives you a new dream, it robs your choice of a non-lewd option during a particular scene, it grants access to the tent scene, and it 'enhances' a certain fitting scene with the blacksmith.
Nothing too much right now, but still early days as we test implementation.
During that particular scene, will it be obvious that the choice is not available due to your corruption being high enough? In addition, where is the tent would the tent scene take place?