Alright, I've had a read.
Contents:
* A 3E-style template for Headless Horsemen. All in all, I like the more in-depth roadmap that these kinds of templates give you. I'd love if the MM had a template for zombies, for example. There's some interesting stuff in there, including hellfire and headless existence, and even some just-fluff abilities like Pumpkin and Site Bound. There is a little awkwardness in the phrasing of the changes to Armor Class, and I think the stat bumps may be a little overboard.
* Stats for an example horseman, including his mount and tactics, and even his story. No real comments here, except that his Pumpkins seem to do damage-y things that the template doesn't mention. The fiction is well done.
* A couple new feats that have abilities gained from the template as prerequisites. At least, one does. The first lists an ability as a prerequisite that isn't actually named that in the template, instead being folded into Headless Existence. But the intent is clear enough. I don't know that these work as Feats, however. They feel more like alternate abilities you might find in the MM's sidebar than Feats -- and used that way, they might add a little spice to your Horseman encounters (assuming you have more than one).
* A quick adventure hook using the sample Horseman.
The art is pretty solid, and I like the pumpkin background that was used for the pages. The pdf is 7 pages, including the cover, a title page, 4 pages of content, and the OGL.
All in all, I don't regret buying it instead of a Monster Energy Drink. It's got some fun ideas that I might yank.
ETA: I should mention that this very much feels like a 3E project that got converted to 5E. That's not a criticism, just an observation.
