A few weeks ago I found myself in need of performing some instant magic. As I did not have the time to construct and perform a elaborate ritual, I decided that the best course of action would be to create a thrall/servitor to work my will. This thrall/servitor would have only one purpose ... to create obstacles that would prevent two individuals from perusing a particular course of action. During the birthing process I instructed the thrall/servitor to put obstacles on the path that these two individuals where traversing. At the time I saw these obstacles to be negative in nature in that they would thwart the plans being made by direct sabotage. Sometime later, however, something rather interesting occurred. My thrall/servitor contacted me and informed me that my will could be more easily accomplished if it could "bless" the two individuals with favorable events rather than thwart their plans through sabotage. I had not thought of this approach when I created the thrall/servitor, so I was somewhat surprised when my little creation suggested it. In any case, I gave the thrall/servitor permission to work my will by bringing about some favorable events for my "victims."
So, the moral of this story is ... favorable events can also function as obstacles to a particular path. Moreover, the victims will never realize they've been cursed.
*Just in case you are interested, my thrall/servitor failed to carry out my will and was promptly destroyed.