The submission has some errors where it seems spellcheck turned one word into another. I think this works just fine as a stand alone plot and I think the variety of options are clever and interesting. Based on the comments, however, it appears I am getting more of a polished product than the previous readers.
I think the greatest flaw in the submission can be seen in the plot hooks, only the first one really is a plot hook and it does not involve the horses specifically. The second one is only a choice, which once made either eliminates the horse from the equation or makes the getaway too easy. The village mascot idea is neat, but it is a complication and not an actual plot. The characters would need a reason to remove the protection of the horse from this field.
This has such potential. The idea of lawmen abusing the item, a society that is entirely accepting of the dead wandering around, moral issues of whether this is inhumane since their free will is stripped. And my personal favorite:
*cleric walks into a town full of zombies*
"AAAAHHH!" *Greater Turn Undead*
"Noooo! without those laborers we're going to starve this winter! You fool you've killed us all!"
I have a soft spot for techromancy, and this could have great applications in a steampunk game. "Oh no, we need this device to run and save the town! But it's infested with cog devils!" I don't know why I think of these little things as adorable, but I do. While they don't really need an origin story it would be nice if there were some theories.
This submission feels not only misleading but rather hollow. I prefer LINDA (looks interesting but never does anything) items to things that are overly malicious. Perhaps the wizard was a *ahem* blue mage? Tired of being mocked by his peers who looked down upon his work he created this spellbook so that any wizard who attempted to steal his work would slowly find themselves... coming around to his way of thinking. Subtly planting erotic images during combat, making erotic sounds at night to keep the party awake, mischief.
I wish the wisper was more reflective of the person it was in life. It doesn't seem to register with me that a bright, strong-willed wizard who devoted his life to educating the populace's legacy should be a fragment of undead that turns you into a gibbering mess.